The Mead #10 Security Business Envelopes are a practical and secure option for sending important documents and confidential materials. The letter size of 4-1/8″ x 9-1/2″ provides ample space for standard paperwork, while the peel and seal feature ensures a tamper-proof seal. With a quantity of 40 envelopes, this pack is perfect for ongoing business needs. The white color adds a professional touch, making these envelopes a reliable choice for any organization.