Measure around the fullest part, under the armpits.
Measure around the natural waistline, inline with the navel.
Measure around the fullest part of your hips, about 20cm (7-7/8") below waist line.
Measure around the thigh just below the crotch.
Stand against a wall, ask someone else to measure from the crotch tothe bottom of your leg.
F. Arm Length:
Measure from shoulder (Humerus) to wrist.
Stand against a wall, ask someone else to measure from the floor to the top of your head, keeping the tape vertical.