50 Pack 7.5″ x 10.5″ #1 Poly Mailers Envelopes Self Seal Shipping Bag, New & Sturdy. Condition is New. Shipped with USPS First Class Package. Very tough sturdy product does the job of getting your product from point a to point b. I ship very fast including on weekends. Hands on small business owner by father and daughter from New Jersey. Please feel free to reach out for other sizes in flat poly mailers, and white Bubble mailers, as well as Kraft bubble mailers. We don’t only talk the talk, we also walk the walk! Fifty years + experience in packing supplies and moving orders very quickly.