Height
Measure from the floor to your head.

Bust circumference
Measure the fullest part of your bust by keeping the tape parallel to the floor.

Waist circumference
Measure the narrowest part of your stomach.

Hip circumference
Stand with your hips together and measure (parallel to the floor) the fullest part of your hips.

Inseam girth
Measure the distance from the uppermost part of your thigh to your ankle.