For women: measure your height barefoot, the bust, smallest part of your waist, the largest part of your hips and bottom, and leg from crotch to ankle.
For men: measure the neck at the Adam's apple (loosening it slightly with one finger), your height barefoot, waist and hips like women, chest below armpits at the fullest part, inseam from crotch to ankle, and sleeve from middle of the neck (between shoulders) and over the shoulder and elbow to the wrist