First things first, for better results pop your birthday suit on but make sure no-one is peeking!
Grab one of those old man tailor tapes and breathe on it, seriously do this as the likelihood is it will be cold (my Dad's a tailor so his word is gospel)
It may help to have someone do this for you, so you have to ask yourself "Do I want to be naked in front of them?!" or if you don't have anyone on hand, get yourself in front of a mirror!
Bust: Measure around the widest part of your bust, make sure the tape measure is level all around
Waist: Measure around your waist, between the bottom of your ribs and above your hip bones
Hips: Place the tape measure around the widest part of your booty, between your hips and thighs
Thigh: Measure the widest part of your thigh.
Ankle: Measure the circumference of your ankle where it is the narrowest
If you're unsure about sizing, feel free to drop us an email at firstname.lastname@example.org or a PM on the Wild Bangarang Facebook Page and we can help you out :)