Your Perfect Fit Calculate Size No worries Click button below to print one out! Download How to find your Perfect Fit. 1. Assemble the tape measure If you have a tape measure please proceed to step 2. Otherwise continue below. Print out the template on 8.5″ by 11″ paper (Landscape orientation). Make sure the margins are .5 in; otherwise the measurements will be inaccurate. Glue or tape the ends marked on the tape measure with “GLUE HERE” 2. Find your fit Measure your body just below the bra band. Type number into Band Size. Measure the fullest part of the bustline. Input into Cup Size. Hit Calculate Size and get your perfect fit!