Use JAM Paper & Envelope #10 Commercial Window Envelopes to send all your business and personal mailings. These classic white envelopes deliver invoices statements and letters to clients businesses and family. No matter where you send them or what you use them for rest assure that your contents are safe and appropriate for all occasions. Plus there s no need to individually address as there is a window to do the job for you. This pack contains 25 commercial window envelopes. Each envelope measures 4 1/8 x 9 1/2 has a booklet opening straight flap gum closure is made from 24 lb. paper and has a smooth finish. Size: 4.125in x 9.5in | Color: White | Quantity: 25/pack