Metronic 268800 Pack Bubble Mailers 6x10 Inch Black Usable Size 6x9" Opaque Padded Envelopes Waterproof Bubble Envelopes Cushioning Mailer for Small Business Mailing Makeup Jewelry GiftsPerfect SizeThe black bubble mailers outer size is 6x10 inch, while the inner size is 6x9 inch. Total thickness is approximately 4. 6 mm, with each side being about 2. 3 mm. Materials consist of 70% LLDPE + 30% LDPE. Economical & ConvenientPadded mailers are an affordable alternative to shipping boxes, and they will soften the impact of handling while your package is in transit,keeping your customer's items safe. Our mailers are easy to use, just