CHEST: Measure the chest at its widest point with a tape measure, keeping it horizontal. SIZE: Measure at the waist (usually the narrowest point, where you can lean your upper body sideways), keeping the tape measure horizontal. HIP: Measure at the hips at the widest point, keeping the tape measure horizontal. BACK CENTER SLEeve: Measure from the middle of the neck to the shoulder, and from the shoulder to the wrist, keeping the arm in a relaxed position. INNER CROWN: Measure from the upper thigh, inside, to the ankle, keeping the leg straight.