The Leo Envelopes DLB White Self Seal No Window 25 Pack features standard business mailing jackets measuring 110x220mm. The premium 80gsm white paper ensures clean corporate presentation. A quick peel-and-seal flap eliminates the need for moisture. It accommodates an A4 sheet folded cleanly in thirds. The solid, windowless layout completely safeguards personal data privacy. It serves as an essential, high-utility accounting office staple.