Accounts Payable Voucher Envelopes - Quantity 100 (Buff)(P15) 12" X 9", 32# paper stock (medium weight) Envelope (jacket) seals on 3 sides with top (long edge) opening with thumb cut for easy access Record information on purchases from one vendor on the envelope and file purchases inside the envelope. Commonly used in automotive dealerships but useful in any business that wants to track their accounts payables. Quantity is 100.