JAM Paper Presidential Blue #10 Policy Envelopes are made out of 28lb, high quality paper and measure 4 1/8 x 9 1/2 inches in size. These envelopes open on the short side and feature straight flaps with reliable, easy to use gum closures. An even total of 50 envelopes is contained in this pack. Use them for any home or office mailing need! Featuring a medium-hue blue color, these envelopes have a light and soft yet professional appearance perfect for business and personal mailings! The size and shape of these envelopes makes them great for receipts, tickets, cash, checks, invoices, brochures, business memos, and more!