A-Frame Size Chart

 

cm 54.9 55.8 56.8 57.7 58.7 59.6 60.6  61.5
inches 21 5/8 22 22 3/8 22 3/4 23 1/2 23 1/2 23 7/8 24 1/4
fitted 6 7/8 7 7 1/8 7 1/4 7 3/8 7 1/2 7 5/8 7 3/4