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.

Single Window - #10 - 9 1/2" Width x 4 1/8" Length - Flap - Wove - 500 / Box - White