These white wove 4-1/8" x 9-1/2" commercial envelopes are manufactured using our popular western sulphite paper with side seams under construction, flap down, and a traditional remoistening seal. The traditional look and size of this 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. Packed in boxes of 500, 7 lbs. per Box