250 #5 (12″ x 15.5″) Self-Seal Unlined White Poly Mailers Size may vary by 1/4″ on either side Free Shipping to any US address! Self-sealing (peel and seal) unlined poly courier mailing envelopes from BubbleFAST. Perfect lightweight shipping option for any small item that does not require cushioning.  Unlined Poly Mailers are: Water Resistant.    Tear Resistant.     Tamper Resistant. USPS, UPS and Fed Ex approved for domestic and international shipping.    Extremely lightweight. Save $$ on shipping your products without compromising on protection. 100% recyclable. Thanks for shopping at Bubblefast Mark and Robin Le Vine