Sleeve Length: Measure from center back to wrist with arms in the riding position
Waist: Measure around the fullest point of your natural waist
Chest: Measure under arms around the fullest part of the chest. Be sure to keep tape level across back and comfortably loose
Outseam: Measure along the outer leg from waist to floor, with riding footwear on
Tip: Best to have someone else measure you
Keep in mind that a number of factors need to be considered to assure a proper fit.
One being your primary riding position; measure according to your motorcycle style