There are several ways to measure your wrist for a bracelet.
For the bracelets that have an opening, here are some of the ways.
There are also several areas of the wrist you can measure; it depends where on your arm you are comfortable wearing a bracelet.
For most people, to make sure you can get the bracelet on, measure the area just on the elbow side of your wrist bone. This small part of your wrist is where you will put the bracelet on. Cuff bracelets are made to go on here, not over the wrist bone, but behind it.
You can also measure the part of your wrist where you will wear the bracelet, which may be different than the area right behind your wrist bone, but you will have to make sure the gap—the opening between ends—is wide enough to get the cuff on your arm.
Wrap a soft, flexible measuring tape, such as one used to measure fabric, around your wrist. Write down the measurement.
Or, cut a piece of paper into a strip at least 8 inches long and 1 inch wide. Use a wider strip if you're interested in a wider bracelet. Wrap the tape around your wrist so it fits as you'd like a cuff bracelet to fit and tape the paper in place. Mark off where the paper ends meet and measure that distance after you remove the paper from your wrist.
Follow the same instructions as the paper measurement but this time, use a string, if desired. Cut the string at least 8 inches long, wrap it in place around your wrist and tape it off. Mark the string, measure the distance between the marks and note your wrist measurement.
Look for a cuff bracelet that's a bit larger than your wrist measurement, which ensures that the bracelet will fit and will not be unwearable if your wrist swells (in humidity, for instance). Include the cuff bracelet's gap in the total measurement for the accessory and measure on the inside of the bracelet to match your wrist size
Remember, what you measured is the inside circumference of the bracelet.
Jewelers can describe the size of a bracelet differently. Some include the opening in the measurement and some give just the length of the metal and give the size of the opening. Make sure you compare apples to apples.
Here is an approximate size chart:
Extra Small ————- 5 1/2 inches
Small ———————– 6 to 6 1/4 inches
Medium —————-- 6 1/2 inches
Large Medium ——-- 6 3/4 inches
Meduim Large ——-- 7 to 7 3/4 inches
Large ———————- 8 inches
In summary, here are the 2 ways to size.
1. Total inside circumference which includes the gap. This corresponds more or less to your wrist measurement. (The best gauge is to measure a cuff bracelet that fits you well and compare to the bracelet you are considering.)
2. Inside circumference from end to end, plus the gap measurement. These two added together equal the total inside circumference which corresponds to your wrist measurement. For example, if your wrist measures 6 1/2", a bracelet that has a 5 1/4" inside circumference end to end and a 1 1/4" gap has a total inside circumference of 6 1/2" and should fit you well.
Also, remember, how well a bracelet will fit you will depend on the width of the bracelet, whether you like to wear the bracelet tight or loose, alone or with other bracelets, in front of or behind the prominent bone on your wrist, changes in temperature (weather) and other factors