White envelopes with security lining ensure privacy6-3/4 size envelopes measure 3-5/8″ x 6-1/2″80 envelopes per box. Customizable: No20 lb. paper.Made in United States Product Description Mead 6-3/4 Security Envelopes. Keep sensitive information confidential. Keep prying eyes off of your important documents with this number 6-3/4 security envelope. It has a printed lining for privacy, so it»s ideal for sending confidential mail, and the V-flap is fully gummed for a secure seal. Each envelope is constructed from 20-lb. bond paper. The 6-3/4-inch style and size is best for checks and brief notes. From the Manufacturer Keep prying eyes off your important documents with this No. 6.75 security envelope with a security tint. The printed lining for privacy is ideal for sending confidential mail. Diagonal flap is fully gummed for secure seal. Each envelope is 20 lb.