DIMENSIONS: ~ #00 Size 5"x 9" Usable Space ~ #0 size 6.5"x 9" Usable Space ~ #2 size 8.5 x 12" Usable Space Manufacturer size tolerance +/- 25". The Cute included 10 Kissy Stickers will put you over the top with your Shipping and Mailing. Great for sealing your mailers with a kiss! Also good for other mailing ideas, parties, scrapbooking, Kids Parties...they have unlimited use