Staples Self Seal Kraft Catalog Envelopes, 9"L x 12"H, Brown, 100 Box Nitrile Glove 500 Post Consumer Recycled Content: Cup Size Compatibility:Compatible with 12 and 16 ounce paper hot cups 500 Post Consumer Recycled Content: 95% Recycled: Yes Refill: No Remanufactured: Yes Supply Type: Toner Total Recycled Content: 95% True Color: Black Warranty Information: 2 Year Yield Type 1: Extra High Yield Yield Type 1 Color: Black Yield per Cartridge (Black): Super High Yield (355916) Yield per Cartridge (Magenta): Super High Yield (355916) Brand Name: Swingline Hole Punched: Yes Number of Holes: 10+ Number of Sheets Per Pack: 500 Paper Weight (lbs Learn more at EcoIDProgram These envelopes are large enough to accommodate letter sized materials without having to fold or bend them