How long is my arm supposed to be? Understanding arm span and body proportions
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4 min read
For most adults, the wingspan—the distance from fingertip to fingertip with arms outstretched—is approximately equal to their height. This simple 1:1 ratio is a classic anatomical guideline used to answer the question: **How long is my arm supposed to be?** However, individual variations based on age, sex, and health factors are common and completely normal.