Getting your invitations designed and printed is the satisfying part. Then reality hits: the stack arrives, your wedding is eight weeks out, and you’re staring at 120 envelopes wondering how many stamps each one needs. This guide walks through every postage decision you will face, from standard rectangular invites to oversized square suites with wax seals, so you can head to the post office fully prepared.
- A standard rectangular invitation weighing 1 oz or under costs $0.78 to mail in 2026 (one Forever stamp).
- Square envelopes trigger a $0.49 non-machinable surcharge, bringing the minimum to $1.27 per piece.
- Suites over 1 oz (thick paper, vellum wrap, wax seal, multiple enclosures) add $0.29 per extra ounce.
- Hand-canceling is free at most post offices and is strongly recommended for wax seals or embellished envelopes.
- USPS plans a Forever stamp rate increase to $0.82 on July 12, 2026 (pending final approval), stamps bought before that date stay valid at face value.
- Mail domestic invitations 6-8 weeks before the wedding; destination weddings need 8-12 weeks.
| Mail Type | 2026 Rate | Notes |
|---|---|---|
| Standard 1 oz letter | $0.78 | One Forever stamp; rectangular, under 3.5 oz max |
| Each additional ounce | $0.29 | Added per oz over 1 oz, up to 3.5 oz |
| Non-machinable surcharge | $0.49 | Square envelopes, wax seals, rigid inserts, thick suites |
| Standard 2 oz suite | $1.07 | Base + one extra oz; Wedding Blooms stamp covers this exactly |
| Square envelope suite (2 oz) | $1.56 | $1.07 + $0.49 surcharge |
| Large envelope (flat) | $1.63+ | Over 6.125″ x 11.5″ or over 0.25″ thick |
| RSVP postcard | $0.56 | If included pre-stamped for guest replies |
| International (Global Forever) | $1.70 | One rate to any country |
Rates current as of January 2026. A rate increase to $0.82 for standard letters is pending approval effective July 12, 2026. Always verify the latest rates at USPS.com before purchasing stamps.
How Much Does It Cost to Mail Wedding Invitations? (2026 USPS Rates)
The base cost to mail a standard wedding invitation in 2026 is $0.78, one Forever stamp. That covers a rectangular envelope weighing up to 1 ounce, no wider than 6.125 inches and no taller than 11.5 inches.
Most standard invitation suites (invitation card + envelope) fall right at or just under 1 oz. Add an RSVP card, an inner envelope, a details card, and a vellum overlay, and you are almost certainly over 1 oz, which means $1.07 (two ounces). A fully loaded suite with belly band, foil-accented cards, and a reply envelope can push 2-3 oz.
Here is what a real-world postage budget looks like for 100 guests:
| Suite Configuration | Postage per Invite | 100 Invites Total |
|---|---|---|
| Invite only, rectangular, 1 oz | $0.78 | $78 |
| Invite + RSVP + details card, 2 oz | $1.07 | $107 |
| Square envelope, full suite, 1 oz | $1.27 | $127 |
| Square envelope, full suite, 2 oz | $1.56 | $156 |
| Oversized or large flat envelope | $1.63+ | $163+ |
Add the same amount again if you are including a pre-stamped RSVP envelope (another $0.78 per piece). For 100 guests with a full suite in a square envelope plus a pre-stamped RSVP, you are looking at roughly $230-$235 in stamps alone, a cost that surprises many couples.
Rate note: USPS has filed for an increase to $0.82 for standard first-class letters effective July 12, 2026, pending Postal Regulatory Commission approval. Forever stamps bought before that date remain valid for any amount forever, no top-up required. Verify current rates at USPS.com before your final purchase.
What Affects Your Postage Cost: Size, Shape, and Weight
USPS calculates postage based on three factors. Understanding all three saves you from guessing at the post office counter.
Factor 1: Weight
Every ounce matters. The thresholds are:
- Up to 1 oz: $0.78
- Over 1 oz, up to 2 oz: $1.07 ($0.78 + $0.29)
- Over 2 oz, up to 3 oz: $1.36 ($0.78 + $0.58)
- Over 3 oz, up to 3.5 oz: $1.65 ($0.78 + $0.87)
Common invitation components and their approximate weights:
| Component | Approx. Weight |
|---|---|
| A7 envelope (standard invitation) | 0.2-0.3 oz |
| 5×7 invitation card, 300gsm matte stock | 0.4-0.5 oz |
| 5×7 invitation, 600gsm Wild Cotton letterpress | 0.8-1.0 oz |
| A2 RSVP card + reply envelope | 0.3-0.4 oz |
| Details card (standard) | 0.2-0.3 oz |
| Vellum wrap or belly band | 0.1-0.2 oz |
| Wax seal (applied to envelope) | 0.1-0.2 oz |
A full suite on standard 300gsm stock with RSVP and details card typically lands around 1.2-1.5 oz, solidly in the 2 oz postage bracket. Letterpress suites on 600gsm Wild Cotton can push 2+ oz without any extras.
Factor 2: Dimensions
USPS considers a piece “standard” (and machineable) when it falls within these ranges:
- Length: 5 inches to 11.5 inches
- Height: 3.5 inches to 6.125 inches
- Thickness: 0.007 inches to 0.25 inches
- Aspect ratio (length divided by height): between 1.3 and 2.5
A standard 5×7 invitation fits within this range. An A7 envelope (5.25″ x 7.25″) also qualifies, just barely. Go larger than 6.125″ tall or 11.5″ wide and you enter the large-envelope (flat) rate starting at $1.63.
Factor 3: Shape
Square envelopes have an aspect ratio of exactly 1.0, which falls outside the 1.3-2.5 machinable range. That alone triggers the non-machinable surcharge, regardless of weight. See the full breakdown in the next section.
Square and Oversized Envelope Postage: The Non-Machinable Surcharge
Square envelopes are a popular choice for wedding invitations, particularly with modern geometric or minimalist designs. But they come at a postage cost: USPS charges a $0.49 non-machinable surcharge on every square envelope because their automated sorting machinery cannot process them.
The math:
- Standard 1 oz rectangular: $0.78
- Standard 1 oz square: $0.78 + $0.49 = $1.27
- 2 oz square: $1.07 + $0.49 = $1.56
Other factors that trigger the non-machinable surcharge (even on rectangular envelopes):
- Wax seals that create a raised bump on the back of the envelope
- Clasps, buttons, twine, or ribbon ties
- Anything that makes the envelope rigid or uneven (thick cardstock inserts, metallic-backed embellishments)
- Envelopes that are square or close to square in aspect ratio
If your suite already has a wax seal on a rectangular envelope, you are likely in non-machinable territory anyway. The stamp count goes from one Forever stamp to two Forever stamps plus change, or use a combination of stamps that totals $1.27 or more.
How to calculate postage for a square invitation
- Weigh your fully assembled suite (see the weighing section below)
- Determine the base letter rate based on that weight ($0.78, $1.07, or $1.36)
- Add the $0.49 non-machinable surcharge
- Total that amount in stamps on each envelope
You can use any combination of Forever stamps, additional-ounce stamps, and non-machinable stamps. USPS sells non-machinable surcharge stamps specifically sized for this situation, or you can use multiple Forever stamps and additional-ounce stamps to reach the right total.
Hand-Canceling: What It Is and When You Need It
Machine sorting at USPS uses rollers and rubber stamps that can damage delicate envelopes, smearing ink, cracking wax seals, bending liner papers, or catching on embossed elements. Hand-canceling means a postal worker manually stamps each envelope with the postmark instead of running it through the machine.
When to request hand-canceling
Request hand-canceling if your invitations have any of the following:
- Wax seals on the envelope back or flap
- Liner paper inside the envelope that could buckle under machine pressure
- Thick or luxe paper (600gsm Wild Cotton letterpress) that may not feed cleanly
- Embossed or debossed elements on the card face
- Vellum wraps, belly bands, or ribbons that create uneven surfaces
How to request hand-canceling
- Bring all envelopes unsealed to your post office counter (staff sometimes need to check them).
- Ask to have them hand-canceled. Most post offices accommodate this; some smaller branches do not, so call ahead if you are unsure.
- Seal the envelopes at the counter if requested, or after staff have confirmed they will process them by hand.
- If your local branch declines, try a larger post office nearby or ask to speak with a supervisor, the service is technically free and is an official USPS option.
Is there a hand-canceling fee?
Officially, USPS does not charge for hand-canceling. However, individual post offices sometimes quote a small fee, typically 5 to 20 cents per envelope. Whether that gets charged depends on the branch and the clerk. The non-machinable surcharge is a separate, mandatory fee for envelopes that cannot go through the machine; it applies regardless of whether you request hand-canceling or not.
USPS Wedding Stamps: Love Stamps and Seasonal Options
USPS stamps are not just a postal formality, many couples choose designs that complement their suite aesthetic. The Love series in particular is designed with weddings and celebrations in mind.
Love 2026
Issued January 13, 2026, the Love 2026 Forever stamps feature stylized birds surrounded by hearts in warm illustrated colors, with art direction by Ethel Kessler and illustration by Kim Parker. Sold in booklets of 20 ($15.60 at the current $0.78 rate). As a Forever stamp, each one covers the standard 1 oz first-class rate and remains valid through the planned July 12 rate increase and any future increases.
Wedding Blooms
The USPS Wedding Blooms stamp is a Two-Ounce stamp valued at $1.07, a perfect single stamp for a standard 2 oz rectangular suite. No need to stack a Forever plus an additional-ounce stamp; one Wedding Blooms stamp covers it cleanly.
Celebration Blooms
Issued in 2024 and still in active stock, Celebration Blooms pairs well with garden, floral, and botanical invitation suites. It is a standard Forever stamp ($0.78).
Seasonal and specialty options
USPS currently has approximately 80 Forever stamps in active circulation. Couples can browse themes to match their wedding season or palette, autumn leaves, holiday designs, botanical prints, national parks, at store.usps.com/store/stamps. Ordering online saves a trip to the post office and ships directly to your door.
For a deeper look at stamp designs, pairing tips by suite style, and how to order in bulk, see the companion guide: USPS Wedding Stamps: Love Series, Designs, and How to Order (2026).
How many stamps should you order?
Calculate stamps for:
- All outgoing invitations (add 10-15 extras for reprints, late adds, or lost mail)
- Pre-stamped RSVP envelopes (if you are including them)
- Your own return address on each envelope if using stamps rather than printing
For a 100-person guest list, a typical order looks like 120 outgoing stamps (covers extras) plus 120 RSVP stamps if pre-stamping reply envelopes.
How to Weigh Your Invitation Suite Before Buying Stamps
The single most important step before buying stamps is weighing one fully assembled sample suite. Skip this and you risk under-stamping 120 envelopes, which means mail returned or stuck in limbo.
Step 1: Assemble a complete sample
Put together one envelope exactly as it will be mailed:
- Outer envelope (sealed)
- Inner envelope (if using one)
- Invitation card
- All enclosures: RSVP card, RSVP reply envelope, details card, accommodation card, map card
- Any inserts: vellum wrap, belly band, ribbon, wax seal applied
This is the weight USPS will charge you for. Weigh without all enclosures and you will underpay.
Step 2: Choose a scale
- A dedicated postal scale (available for $15-30 online) gives the most accurate reading and is worth the investment if you are mailing 100+ invitations.
- A kitchen scale that reads in increments of 0.1 oz or less works fine for most suites.
- Your local post office will weigh for free, bring your assembled sample to the counter and ask a clerk to weigh it and confirm the postage before you buy anything.
Step 3: Map the weight to the right postage
Once you have the weight, use the table at the top of this guide to find your per-piece postage. Add the non-machinable surcharge if applicable. That total is what each envelope needs in stamps.
Taking 10 minutes to weigh before you buy stamps will save you from under-stamping and the frustration of returned mail. If your invitations are on their way from a stationer, weigh one of the paper stock samples or a test assembly while you wait, many couples do this before their final order even ships.
When you are ready to choose your invitation suite, browse the full range at Paperlust wedding invitations, every design is available in a range of paper weights and print methods, so you can weigh your samples ahead of time and plan your postage budget before ordering.
When to Mail Wedding Invitations: The Timing Guide
Postage is only half the equation. Sending invitations at the right time gives guests enough lead time to book travel, request time off, and RSVP before your deadline.
Standard domestic timeline
- 6-8 weeks before the wedding is the standard window for domestic US guests.
- This gives guests enough time to confirm schedules, arrange childcare, and respond by your RSVP deadline (typically 3-4 weeks before the wedding).
Destination wedding timeline
- 8-12 weeks before the wedding for destination weddings where most guests need to book flights or accommodation.
- Even earlier if your venue is in high demand or the event falls on a holiday weekend.
Save the date timing
Save the dates go out earlier, typically 6-12 months ahead for standard weddings and up to 12-18 months ahead for destination events. This is your first official notice to guests and holds the date while invitations are in production.
Production timeline to factor in
If you are ordering from Paperlust, your designer proof arrives within 1-2 business days of placing your order. Production time from approved proof to dispatch varies by print method:
- Digital print: approximately 8-10 business days
- Flat foil: approximately 20 business days
- Letterpress: approximately 20 business days
After dispatch, US delivery via DHL Express typically takes 2-4 business days. Build your mailing date backward from your mail-by target to know when to place your order. For orders over $350 USD, DHL Express shipping is included at no charge.
A note on digital alternatives
Some couples send digital save the dates, particularly useful when address collection is still in progress or for a subset of guests who prefer digital communication. A digital file (JPEG or PDF) keeps your suite cohesive while you finalize your printed invitation order. This is available through Paperlust customer service for $35 flat; you receive the files and send them yourself via email or text.
Mailing checklist before you go to the post office
- All envelopes addressed and double-checked for spelling
- Return address on every outer envelope
- RSVP envelopes pre-stamped (if including)
- One sample suite weighed and postage confirmed
- All envelopes stamped consistently
- Hand-cancel request confirmed with your post office if needed
- Extras set aside for late additions or returned mail
Frequently Asked Questions
How much postage do I need for a wedding invitation?
A standard rectangular invitation weighing 1 oz or under requires $0.78 in 2026, one Forever stamp. Most suites with multiple enclosures weigh 1-2 oz and cost $1.07 to mail. Always weigh one fully assembled sample before buying stamps to get an exact figure.
Do I need extra postage for square wedding invitations?
Yes. Square envelopes trigger a $0.49 non-machinable surcharge on top of the standard letter rate because USPS automated sorters cannot process them. A 1 oz square invitation costs $1.27 to mail; a 2 oz square suite costs $1.56.
Can I put two stamps on a wedding invitation?
Yes, you can use any combination of stamps that totals the required postage. Two Forever stamps equal $1.56, which covers a 2 oz square suite. You can also combine a Forever stamp with an additional-ounce stamp (total $1.07) for a 2 oz rectangular suite, or add a non-machinable stamp for square envelopes.
Do I need extra postage for wax seals?
Often yes. Wax seals add a small amount of weight (approximately 0.1-0.2 oz) and create a raised bump on the envelope that can trigger the $0.49 non-machinable surcharge, since the envelope can no longer run cleanly through sorting machines. Weigh your sealed envelope with the wax seal applied to know your exact postage.
What are USPS wedding stamps?
USPS releases Love series stamps each January designed specifically for weddings and celebrations. The 2026 Love stamp features illustrated birds and hearts. USPS also sells Wedding Blooms (a Two-Ounce stamp, perfect for 2 oz suites) and Celebration Blooms Forever stamps. Browse all options at store.usps.com.
Is hand-canceling free at USPS?
Officially yes, USPS does not charge for hand-canceling. Some individual post offices quote a small per-envelope fee (5-20 cents), which may be waived if you ask. Hand-canceling is different from the non-machinable surcharge, which is a mandatory postage fee.
When should I mail wedding invitations?
For domestic US weddings, mail invitations 6-8 weeks before the wedding date. For destination weddings where guests need to book travel, mail 8-12 weeks in advance. Save the dates go out earlier, 6-12 months ahead for most couples, up to 18 months for destination events.
How do I weigh my wedding invitation suite?
Assemble one complete sample envelope with every insert, enclosure, and embellishment exactly as it will be mailed, then weigh it on a postal scale or kitchen scale. Alternatively, bring a sample to your local post office and ask a clerk to weigh it for you, it is free and takes a few minutes. This step is essential before buying stamps for your whole guest list.
What is the postage for a large or oversized wedding invitation?
If your outer envelope exceeds 6.125 inches tall, 11.5 inches wide, or 0.25 inches thick, it qualifies as a large envelope (or flat) and the rate starts at $1.63 for 1 oz, increasing by weight. Check your envelope dimensions before ordering to know whether you will fall into standard-letter or large-envelope postage.
Can I use a QR code instead of including an information card to save weight?
Yes, and it is a growing trend. Printing a QR code on your invitation or save the date that links to your wedding website cuts the details card from your suite entirely, reducing weight and the number of inserts. This can bring a full suite back under 1 oz and eliminate extra postage.
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