6" x 9" booklet envelopes feature a gummed flap and durable, 24 lb. white wove stock for home or office mailing, storing and organizing. Whatever your needs, booklet envelopes are a must for keeping projects, files and mailings manageable. Envelopes open on the long side for easy insertion and retrieval. Sturdy booklet envelopes are made of 24 lb. white wove stock to withstand extensive handling and mailing. Contents are protected during use to give you assurance they arrive unharmed. They are perfect for folded or smaller documents. Fully gummed flap ensures a secure, permanent seal.