In order to give you an indication of fit and sizing, you can either:
Double the measurements and match against the table below to know what size you are, or;
you can compare it with any of your similar item in the wardrobe.
How to measure?
Bust: Measure around the fullest part of your chest
Waist: Measure around the narrowest part of your natural waist above your hip
Hips: Stand with your feet together and measure around the fullest part of your hips
After measuring yourself, match it against the table below: