9.5x13.5" Usable Space. Manufacturer size tolerance +/- 25". These Strong and Durable Flashy Holographic Design Bubble Mailers will make you stand out in your packaging and shipping. 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 uses.