Quality Park?. Redi Strip Security Tinted Envelope, #10, 4 1/8 x 9 1/2, White, 30. Park Ridge Embossed Window Envelope, #10, 4 1/8 x 9 1/2, White, 50. Quality Park™ Clasp Envelope, 7 x 10, 28lb, Brown Kraft, 100/Box.