Package Contents: 500 x Poly Mailers 6.5 x 10 White Plastic Shipping Bags Envelopes, Self Seal Useable Size: 6.5 x 10 inch / 17 x 25.4 cm (Please double check the size before purchase!!!!) Features: Quantity: 500 Color: White Self Sealing Poly Courier Shipping Mailers with Adhesive Strip High Quality 2 Mil Self Sealing Mailers Lightweight to not increase shipping costs Superior tear and puncture resistance .