Custom No. 10 Envelope - (500/Box)Streamline your mailing operations with this bulk box of 500 custom No. 10 envelopes. The standard 4. 125" x 9. 5" format accommodates letters, checks, and documents without folding. Each envelope is pre printed with your custom designperfect for adding your company branding, return address, or logo for a consistent and professional look. Key Features Standard No. 10 envelope size (4. 125" x 9. 5") Custom printed with your logo, return address, or