How to Find the Right Size for You
Bracelet and Anklet Length
The US National average for bracelet length is 7 inches. I find this to also be the most common size ordered, and most people fall into the 7 - 7 1/2 inch range.
There's three different ways you can find the right length for you. First option, take a bracelet or anklet you like the fit of and measure it from end to end (even the clasp).
Second option is to take a sewing tape measurer and measure your wrist or ankle. Make sure to add at least half an inch to the final measurements in this instance so there's a little wiggle room.
Third option is to take a piece of string and wrap it around your wrist or ankle and then measure how long it is. Once again add at least half an inch to the final measurements. If you don't have a ruler or tape measurer there are apps in both Apple and Google Play for rulers on your phone.
For closer to the skin cuff like Bracelets adding a 1/4 inch to the final measurements is preferred instead of a half inch.
AVERAGE Lengths for Women
14 inches: Tightly around the neck
16 inches: Tightly against base of throat
18 inches: On the collarbone
Measuring a necklace you like the length of from end to end is the best way to find your perfect length. The above methods for finding bracelet length can be applied to Necklace lengths as well.