We recommend getting some help – it's tricky to get accurate measurements without it. Keep the tape measure close to your body but don't make it too tight. Remember, being totally relaxed, with good, natural posture, will give you the best results.
Place the tape measure under your armpits and measure across the chest at its greatest point. Don't forget to keep the tape horizontal.
Measure from the outer edge of your shoulder, down over the elbow and on to the wrist bone.
Measure around your waist where your trousers or jeans usually sit.
Measure from the crotch, where the inside of your leg begins and down to your ankle.