Quality Park No. 11 Brown Kraft Business Envelopes - Business - #11 - 4 1/2" Width x 10 3/8" Length - 28 lb - Gummed - Kraft - Kraft - 500 / Box

No. 11 business envelopes are perfect for mailings that require strength and confidentiality. Oversized, durable envelopes are made of heavyweight, 28 lb. brown Kraft stock that is strong and opaque, keeping your contents confidential. Brown stock stands out against white envelopes to get your recipient's attention. Fully gummed flap provides a secure seal.