Precision Fit #8 Envelopes For Checks - These #8 double window envelopes measure 3 5/8 x 8 11/16 inches, designed for voucher-style check layouts with consistent insertion during accounts payable workflows. Address Alignment - Double window design displays return address in top window and payee address below, eliminating need for labels during check runs. Safe Mailing with Inner Security Tint - Printed security tint reduces read-through and memo lines during transit for payroll and financial documents. Reliable Gummed Seal - Traditional moisture-activated gummed flap creates secure closure for consistent sealing across high-volume check runs. Bulk 500 Pack - 500-count pack made from 24lb white paper for recurring payment and mailing workflows. weight: 5.06 pounds.