1000pcs/order. we don’t ship items to APO’s, FPO’s, AE’. exterior size: 4″ x 6″+ 1.5″flap. interior size: 4″ x 6″ (2.5 Mil thickness, it is stronger than items with 2.4mil, 2.35mil,2.0mil,1.7mil ) * gray outer surface, black inner layer. (** not white surface**) * self sealing mailers. * strong glue. * water proof. * tear resistant. * lightweight. * 100% recyclable. * No international shipping. * 8oz /100pcs. * 5lbs 2oz /1000pcs. * You weight 100pcs/or 1000pcs you bought from other stores, how many lbs are they? you will know our items is better.