Sold as 100/Box. Booklet envelopes keep your documents flat in the mail. Envelope size: 9"H x 12"W. Gummed flap closure keeps your documents secured inside the envelope. Envelopes have square flap. Made of white wove paper. 100 envelopes per box. Envelope size: 9"H x 12"W. 100 envelopes per box. Gummed flap closure keeps your documents secured inside the envelope. Envelopes have square flap. Mail items safely by using this 100-pack of Staples 9 x 12-inch white wove side-opening booklet envelopes. Easily ship items with these booklet envelopes. With a 28-pound paper construction, these envelopes are durable, helping get mail shipped safely, while the side-opening flap is heavily gummed, keeping invoices, reports, and other important documents secure. These Staples booklet envelopes are made with white wove paper material, and the side-opening flap is convenient for inserting and removing large items. Booklet envelopes keep your documents flat in the mail. Envelope size: 9"H x 12"W. Gummed flap closure keeps your documents secured inside the envelope. Envelopes have square flap. Made of white wove paper. 100 envelopes per box. Reduce the hassle, frustration and paper cuts of standard top-opening document envelopes with these side-opening envelopes. These booklet envelopes come in crisp white for a professional appearance and are ideal for document mailing. These Staples envelopes easily accommodate standard-sized documents and are great for business, home or school use. These 9-inch by 12-inch envelopes are ideal for storing and mailing certificates or other documents that should not be folded.Easy Side-Loading Envelopes Save TimeWith the side-opening feature, these Staples envelopes are great for mass mailings or other large-quantity projects. These side-opening envelopes provide more room for your hands when you insert documents, saving time and reducing frustration compared to standard, top-load envelopes.Secure DocumentsThese side-opening envelopes have heavily gummed flaps to provide a strong seal, keeping your documents from sliding out. These solid, 28-pound white wove envelopes provide privacy for your documents and do not have windows. Professional AppearanceThese booklet style envelopes come in crisp white to give a clean, neat appearance.