150pcs/order. we don’t ship items to APO’s, FPO’s, AE’s exterior size: 4″ x 6″+(1.5″flap). interior size: 4″ x 6″ 2.5 Mil,high quality. * silver outer surface, black inner layer. * high quality self sealing mailers. * strong glue. * water proof. * tear resistant. * lightweight. * 100% recyclable. * No international shipping.