Please measure your wrist and add around 0.8-1.2 cm for a tight fit and up to +2.5cm for a looser fit (0.4-1 inches).
Measure with a tape measure, snugly around your wrist for accurate measure, if you cannot find a tape measure you can download and print one out here: tapemeasure
We do not include the loop hole in our measurement. Since the bracelet is made out of leather, it will soften and stretch a little bit once worn.
For our "custom" size, when you come to "check out" there is a comment field where you can add the length and/or colour you want.