Business Source No. 9 Double Window Invoice Envelopes Double Window – #9 – 8 7/8″ Width x 3 7/8″ Length – 24 lb – White – 500 / Box (BSN36680)

No. 9 envelopes feature security tint and double windows and are compatible with most standard letter-size, computer-generated invoices and statements. The 1-3/16″ x 3-1/2″ top window is positioned 3/8″ from left and 2″ from the bottom of the envelope. The bottom window (1″ x 4″) is 3/8″ from the bottom. 24 lb.