500 Bags #000 4" x 8" Waterproof Poly Padded Bubble Mailing Envelopes Bags 4x8 2.5 millimeter thickness, Recyclable: Yes. Water Resistant, Lightweight and Padded Interior. Color: White/Grey, Paper Liner: Clear with antistat. Lip Size: 1.5 +/- , Bubble Lining: 3/16. Usable Dimensions: 4" x 7", Outer Size: 5" x 7" + 1.57".