Dimensions Guide

Arch Size From To From To
22 20 1/4 23 3/4 10 1/8 11 7/8
24 22 1/4 25 3/4 11 1/8 12 7/8
26 24 1/4 27 3/4 12 1/8 13 7/8
27 25 1/4 28 3/4 12 5/8 14 3/8
28 26 1/4 29 3/4 13 1/8 14 7/8
30 28 1/4 31 3/4 14 1/8 15 7/8
32 30 1/4 33 3/4 15 1/8 16 7/8
33 31 1/4 34 3/4 15 5/8 17 3/8
Step 1:
34 32 1/4 35 3/4 16 1/8 17 7/8
36 34 1/4 37 3/4 17 1/8 18 7/8 Step 2:
38 36 1/4 39 3/4 18 1/8 19 7/8
39 37 1/4 40 3/4 18 5/8 20 3/8
Note:
40 38 1/4 41 3/4 19 1/8 20 7/8
42 40 1/4 43 3/4 20 1/8 21 7/8
44 42 1/4 45 3/4 21 1/8 22 7/8
45 43 1/4 46 3/4 21 5/8 23 3/8
46 44 1/4 47 3/4 22 1/8 23 7/8
48 46 1/4 49 3/4 23 1/8 24 7/8
50 48 1/4 51 3/4 24 1/8 25 7/8
51 49 1/4 52 3/4 24 5/8 26 3/8 Width Height
52 50 1/4 53 3/4 25 1/8 26 7/8 Maximum: 73 1/2" 36 5/8"
54 52 1/4 55 3/4 26 1/8 27 7/8 Minimum: 20 1/2" 10 3/8"
56 54 1/4 57 3/4 27 1/8 28 7/8 Min. Window Depth: 2 1/2"
57 55 1/4 58 3/4 27 5/8 29 3/8
58 56 1/4 59 3/4 28 1/8 29 7/8
60 58 1/4 61 3/4 29 1/8 30 7/8
63 61 1/4 64 3/4 30 5/8 32 3/8
66 64 1/4 67 3/4 32 1/8 33 7/8
69 67 1/4 70 3/4 33 5/8 35 3/8
70 68 1/4 71 3/4 34 1/8 35 7/8
72 70 1/4 73 3/4 35 1/8 36 7/8
Window Arch Size Considerations
Tallest height should be half of the
width size (Perfect Arch). If window
size can accommodate two size
ranges, it is recommended to use the
larger size for a more secure fit.
Arch Dimension Guide
Fits Window
Width in
Inches
Fits Window
Height in
Inches
How to Measure Window Arch
Measure the base width inside the
window opening.
Measure the tallest point height
inside the window opening.