The traditional look and size of this #10 business envelope does make it highly demanded, but the quality of this envelopes surpasses competitors and makes it an easy choice. Have confidence in your projects with this reliable product. This popular line of white wove 4-1/8" x 9-1/2" commercial envelopes is manufactured with diagonal seams, no window, flap down, and a traditional remoistening seal. Packed in boxes of 500. 7 lbs. per Box