For arm length

[DaxxKahn]

Some measure from the arm pit to the end of the hand (Fingertip)...Others measure the entire wingspan....Sometimes you will see on television where a fighters reach is 27"....those are the times they measure from the armpit.......

It is the fingertip to fingertip measure that is most valid and used most often

[beginers09]

i have measured my winspan it was 67 inch

and also i try measure my fist to armpit and it was 24.5 inch

but when i raise them up and look in the mirror they dont look long but short.

im 5'5 3/4" inches tall