Chest: measure just under the arms and across shoulder blades holding tape firm and level, with your arms down by your sides.
Sleeve: with arm relaxed at your side and slightly bent, measure from centre back neck, over point of shoulder, down the outside of the arm down to the wrist bone.
Waist: measure around your natural waistline.
Seat: measure around fullest point of seat while standing.
Inseam: measure bottoms that fit you well. Lay them flat, with the front and back creased smooth. Measure along the inseam from crotch to bottom of leg hem. On body = crotch to inside ankle bone.
Socks: lengths are measured up from the heel.