Bust/Chest: Measure around the fullest part, keeping the tape level.
Waist: Measure around the narrowest part of your waist.
Hips: Measure around the widest part of your hips.
Sizes can vary by style and fit (e.g., compression vs. loose fit), so refer to the specific product's size chart when available. If you're between sizes, consider sizing up for a more relaxed fit or down for a snugger fit.