Red #10 Envelopes - 100 Envelopes - Desktop Publishing Supplies&trade; Brand Envelopes Holiday Red #10 Envelopes Red #10 "Business Size" Envelopes measure 4 1/8" x 9 1/2" Made from 24lb Bond / 60lb Text Red Paper Stock Inkjet, Laser, & Copier Compatible Flap is Gummed for Sealing