Here is a Draw Length Chart, That May help if there trying to figure out their Draw Length. I Hope It Helps some Measure the wing span, Finger tip to Finger tip Across the rear of the shoulders
Ruler Length Inches- Draw Length
50- 20
55 -22
57 - 22.8
58- 23.2
59- 23.6
60 -24
61 -24.4
62 -24.8
63 - 25.2
64 - 25.6
65- 26
67 - 26.8
68- 27.2
69 - 27.6
70- 28
71- 28.4
72- 28.8
73- 29.2
74 -29.6
75- 30
76- 30.4
77- 30.8
78- 31.2
79- 31.6
80- 32
81- 32.4
82 - 32.8
83 - 33.2