Generic Poly Padded Envelopes Mailers for Postage Shipping Usable Size 3" x 6" Pack of 50pcs (1) Usable Size: 75 x 150mm, 3" x 6" approx. (Not include area outside of seal). Total Size: 95 x 150+40mm, 3.7" x 6"+1.6" approx. (2) Usable Size: 102 x 178mm, 4" x 7" approx. (Not include area outside of seal). Total Size: 122 x 178+40mm, 4.8" x 7"+1.6" approx. (3) Usable Size: 130 x 205mm, 5" x 8" approx. (Not include area outside of seal). Total Size: 150 x 205+40mm, 5.9" x 8"+1.6" approx. Color: Grey-white outer surface & grey inside, making them 100% opaque Material: 100% Virgin Polyethylene (PE)