1.Bust
The widest point of your bust - keep measuring tape horizontal

2.Waist
The narrowest point of your waistline, above your hips and below your bust

3.Hips
The widest point of your hips at the top of your legs, 8 inches below your waist

4.Centre Back Length
(length of sizes 12-28)
According to the style of the garment it is the measurement taken from the top back to hem.
TOP - from back neck to hem
SKIRT - from the top of the back waistband to hem

5.Outside Leg
(length of sizes 12-28)
TROUSERS/JEANS - from the top of the waitband to the hem