Size guide
Chest
Take the measurement at the most important place, at the level of the tip of the breasts, leave the tape measure a little loose.
Sizes
Note the measurement in the hollow of the waist, tighten the tape measure a little.
Hips
Take the measurement where the buttocks are the most plump, do not tighten. You can slide the tape measure up and down to check that you have taken the largest measurement.