Strathmore 25% Cotton Business Envelopes, Ivory, 24 lbs, 4 1/8 x 9 1/2, 500/BoxCreate elegant and distinctive brand identity materials and personal stationery by coordinating Strathmore envelopes and business paper. Watermarked. Acid-free for archival quality. Durable for embossing, engraving or letterpress. Electronic printing guaranteed – superior performance in all office equipment. 100% of the electricity used to manufacture Strathmore paper is matched with Renewable Energy Credits (RECs) from Green-e certified windpower projects, and the thermal energy used in the manufacture of this paper is offset with Verified Emission Reduction credits (VERs). This product was made from wood sourced from a certified managed forest. Envelope Size: 4 1/8 x 9 1/2; Envelope/Mailer Type: Business/Trade; Closure: Gummed Flap; Trade Size: #10.