Quality Park?. Park Ridge Embossed Window Envelope, #10, 4 1/8 x 9 1/2, White, 50. Rise above the competition. However, unlike traditional envelopes, they’re designed with Park Ridge™ detailing. Quality Park™ Clasp Envelope, 6 1/2 x 9 1/2, 28lb, Brown Kraft, 100/Box.