This ‘Straight and Wavy’ birthday invitation design features a combination of straight and wavy lines on the edges of white and black blocks of colour, for a black and white birthday invitation that is sophisticated and bold. This birthday black and white design is perfect for any age and any style of party, from a casual backyard barbecue to a fancy birthday cocktail party. Whether you’re more of a straight-edged partier or more of a wavy wild child, this is the birthday invitation for you. Birthday Invitations - Flat Foil