How To Measure
For neck size: Measure the base of your neck using a soft measuring tape or string, then round up to the next half inch. The tape should be snug around your neck, but not tight, and should sit just below your Adam's apple. If you add length to your measurement, your collar will have a loose fit. Each collar is adjustable +/-1.5"; i.e., a 15.5" collar will be adjustable from 14" to 17".
For wrist size: Measure your wrist just below the joint using a soft measuring tape or string, then round up to the next half inch. The tape should be snug, but not tight. If you add length to your measurement, your cuffs will have a loose fit. Each cuff is adjustable +/-1"; i.e., a 6" cuff will be adjustable from 5" to 7".