The measurements refer to body size, not garment dimensions.

Regular fit:

A fit that is not too loose or too baggy.

It contours the natural shape of the body for mobility.

Loose fit:

A more generous cut.

It drapes loosely on the body for maximum comfort.

Oversized fit:

A large fit of considerable size and volume.

Bust:

measure at underarm around the chest, at fullest part of the chest.

Waist:

measure around the smallest part of your waist.

Hip:

standing straight with your feet together, measure around the fullest part of your hips.

Thigh:

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.

Bicep:

With your arm hanging at your side and relaxed, wrap the tape measure around the largest part of your arm, near your armpit.