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Number 11 Envelope Size

Commercial sizes #11envelopes are 4 1/2" high x 10 3/8" wide. For those occasions when a bit bigger envelope than a #10 is required, the #11 regular is just the envelope for the task. Number 11 regulars have ample interior allows for more folded pages. Ideal for multiple office usage as well as storage purposes, the 11 regular evelopes may also be utilized as an outer envelope if you choose to use the 10 regular as a return-envelope. Available in White and Brown Kraft only.
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#11 Western Sulphite Regular Envelope (W3376) #11 Envelopes (4 1/2 x 10 3/8) 24lb White 500/BX

4-1/2 x 10-3/8 (#11), 92% White, 24lb, 500/Box

Price: $36.00
Western Sulphite Window Envelope (No. 11) 3504 #11 Window Envelopes (4 1/2 x 10 3/8) 24lb White 500/BX

4-1/2 x 10-3/8 (No.11), 92% White, 24lb, Window A, 500/Box

Price: $41.00