These boxes of 500 white #9 double window security envelopes (3 7/8 in x 8 7/8 in) protect your customers' sensitive data; a reflex blue pattern obscures the details of what's inside

Redi-Seal self seal mailing envelopes require no moisture; the unique double flap design allows you to simply raise the lower flap and press to seal

Double window envelopes show sender and receiver addresses; top window is 1 3/16" x 3 1/2"; 3/8" from the left; 2" from the bottom; bottom window is 1" x 4"; 3/8" from the left; 1/2" from the bottom

#9 Mailing envelopes measure 3 7/8 in (height) x 8 7/8 in (width) and are made of 24 lb white wove paper with professional side seams; #9 envelopes fit into #10 envelopes

Stock up on boxes of 500 machinable #9 envelopes for bulk mailings