Staples

Staples Self-Sealing Security-Tint #10 Envelopes, 4-1/8 x 9-1/2, White, 500/Box (511289/99296) | Quill

US #10 business envelopes are suitable for all your mailing needs. Made from white 24 lb. paper for durability | Staples Self-Sealing Security-Tint #10 Envelopes, 4-1/8 x 9-1/2, White, 500/Box (511289/99296) | Quill