This set of 4 blank cards comes with its own matching box. The box slides open like a matchbox and contains 4 similar cards with envelopes. The box will hold any cards of A2 size (4.25" X 5.5") so once the original supply is gone simply refill with more! This set makes a great gift for any stationary lovers. There is even space left in the box if you wanted to add a pen, stickers, or postage! Box and cards are made from heavy-weight cardstock.