Quality Park No. 8 5/8 Double-Window Security Envelopes with Reveal-N-Seal?? Self-Seal Closure - Double Window - #8 5/8 - 3 5/8" (91.95 mm) Width x 8 5/8" (218.95 mm) Length - 24 lb (10886.22 g) - Self-sealing - White - 500 / Box 67539