Bust or chest
Run the tape around the fullest part of the chest, keeping it level under the arms and parallel to the floor. Breathe normally and keep the tape snug, not tight.

Use a soft tape measure, stand naturally, and keep the tape flat against your body. Ask someone to help with measurements across your back.
Select a measurement to see where to place your tape
Run the tape around the fullest part of the chest, keeping it level under the arms and parallel to the floor. Breathe normally and keep the tape snug, not tight.