The interior built with bubble lined wall construction for extra protection during transit The available size is 5 x 7 inches. When the length and width of your item reaches 4.5 x 6.8 inches and the thickness of the item exceeds 1/8 inch, please choose a larger size bubble mailer. The interior built with bubble lined wall construction for extra protection during transit Multi-use envelopes. Kraft mailers can be used from home or business for customers, friends, or family. To ship electronics, cosmetics, accessories, delicate items, jewelry and much more