Our greeting cards are available with any initial from our sample library which includes the entire alphabet and the numbers 1 thru 6. They are sold in packs of 10 and are blank inside making them perfect for shower gifts, birthdays, invitations, thank yous, or simply a whimsical alternative in personal stationary. They fit into a white 5 x 5 envelope. Note: Extra postage is required to mail a square envelope.