Tuxedo - fabrics
Tuxedo - styles
Suits - I will ask someone to take my measurements
Normally it should be until your thumbnail. If you need it longer or shorter please measure it accordingly.
Measure around your chest where it is the maximum. Make sure that the tape is straight on the back side and not lower.
Measure around your stomach where it is the maximum.
Make sure the tape is on the side bulge if you have one.