Tailor's measure is a term used to describe the measurements taken by a tailor when creating a custom-made garment. The three main measurements are SLEEVE, WAIST, and inseam. SLEEVE is the measurement from the shoulder to the wrist, WAIST is the measurement around the narrowest part of the torso, and inseam is the measurement from the crotch to the bottom of the leg. These measurements are essential for a tailor to create a garment that fits perfectly.