The measurements refer to body size, not garment dimensions.
A fit that is not too loose or too baggy.
It contours the natural shape of the body for mobility.
A more generous cut.
It drapes loosely on the body for maximum comfort.
A large fit of considerable size and volume.
HOW TO MEASURE
measure at underarm around the chest, at fullest part of the chest.
measure around the smallest part of your waist.
standing straight with your feet together, measure around the fullest part of your hips.
While standing, measure your thigh by wrapping the tape around one leg at the midpoint of the thigh, from front to back going in between your legs.
With your arm hanging at your side and relaxed, wrap the tape measure around the largest part of your arm, near your armpit.