SIZE & PRINT: 50pcs poly mailers 12 x 15.5 included, thank you notes and floral printed in the pink poly mailers SIZE & PRINT: 50pcs poly mailers 12 x 15.5 included, thank you notes and floral printed in the pink poly mailers THICKNESS: 3 Mil thick heavy-duty 12×15.5 poly mailer are waterproof and durable, highly resisting tears, punctures and damages NO SEE THROUGH: These large poly mailers were no see through, black inner lining protect your privacy perfectly Self-Sealing: Self adhesive seal strip – easily close and ship your envelopes, no licking or water needed, tamper-evident, and super secure closure WIDELY USE: Our 12×15.5 shipping bags make a great idea for quickly shipping clothing, pants, blankets, leggings, t-shirts, and other non breakable items