Quality Park?. Redi Strip Security Tinted Envelope, #10, 4 1/8 x 9 1/2, White, 50. Quality Park™ Redi Strip Catalog Envelope, 9 x 12, Brown Kraft, 100/Box. 2-Window Security Tinted Check Envelope, #8 5/8, 3 5/8 x 8 5/8, Wh.