Supremex Single Window Envelope #10 - White - 500/Box - Single Window - #10 - 9 1/2" (241.30 mm) Width x 4 1/8" (104.78 mm) Length Diameter - Flap - White - Wove - 500 / Box

No. 10 envelopes offer a smooth seamless interior for perfect insertion every time and a standard window for easy mailings. With this design, you'll have no catching on seam while inserting so it reduces jamming and downtime. Easy-to-use envelope has an open side and outside side seam. 24 lb. envelopes meet Canadian and U.S. postal standards. SKU: SPX1040480FSC