JAM Paper® #10 Window Envelopes, 4-1/8 x 9-1/2, White, Pack Of 500 Envelopes

Window envelopes let you put your best foot forward by letting you outwardly flaunt what is on the inside with the clear plastic window located at the bottom left of each one. These envelopes measure 4 1/8 x 9 1/2 inches in size, making them perfect for brochures, business mail, and personal mail.