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Window Envelopes

Below you will find standard sizes, the dimensions and the window positions for window envelopes.

Standard Sizes for Window Envelopes

Window Envelope No.	Window Envelope Size	Size of Window	Standard Window Position from Left Right
6 1/4	3 1/2 x 6	1 1/8 x 4 1/2	3/4	1/2
6 3/4	3 5/8 x 6 1/2	1 1/8 x 4 1/2	7/8	1/2
7	3 3/4 x 6 3/4	1 1/8 x 4 1/2	7/8	1/2
7 3/4	3 7/8 x 7 1/2	1 1/8 x 4 1/2	7/8	1/2
9	3 7/8 x 8 7/8	1 1/8 x 4 1/2	7/8	1/2
10	4 1/8 x 9 1/2	1 1/8 x 4 1/2	7/8	1/2
11	4 1/2 x 10 3/8	1 1/8 x 4 1/2	7/8	1/2
Check Window	3 5/8 x 8 5/8	1 x 4	1	3/4