Wear whatever undergarments you would wear on a normal day. For instance, you would wear the same type of bra you usually wear. If you usually go braless, measure your chest without a bra. If you’re nonbinary and you bind your chest, measure with your binder on. [3] X Expert Source David PewProfessional Tailor Expert Interview. 5 January 2021.
Don’t stick your chest out or exhale; just stand normally. Make sure the tape measure is not twisted.
If you must take the measurement yourself, do it in front of a mirror, so that you can see if the tape is parallel to the ground all the way around.
Hold the ends of the tape with both hands in the front of your body, so you’ll be able to see the measurement. Look in the mirror and make sure the measuring tape isn’t twisted. Ensure the tape is at the same height all the way around. It should be parallel with the ground.
Don’t look down at the tape to take your measurement, since this can cause it to slip out of place. Look in the mirror instead. Add 2 inches (5cm) to the measurement for any garment that you want to be slightly loose, such as a dress shirt. Always round up the measurement when buying clothing.
