Would you mind sharing how your 17" measurement was taken?
So much depends on body type, shape and frame size"
(Body types)
Ectomorph: Lean and long, with difficulty building muscle
Endomorph: Big, high body fat, often pear-shaped, with a high tendency to store body fat.
Mesomorph: Muscular and well-built, with a high metabolism and responsive muscle cells.
(Body Shapes)
Pear, apple, rectangle, inverted triangle and hourglass
(Frame size)
Measuring the width of the bones in elbow joint
Small
Medium
Large