Jade bangle size

Measure first, then come back to this box. The instructions are directly below it, and they take about a minute with a strip of paper.

The measurement people take by instinct is of the wrist, and it is the wrong one. Take this one instead.

1. Fold the hand you intend to wear it on. Bring your thumb across your palm toward the base of your little finger and squeeze everything inward, as if you were about to post your hand through a gap slightly too small for it. This is the shape the bangle has to cross, so it is the shape you measure.
2. Wrap a strip of paper around the widest part of that folded hand, usually across the knuckles and the base of the thumb. Pull it snug rather than tight. Mark where the end meets, take it off, and lay it flat against a ruler.
3. Divide by 3.14. That is your inner diameter in the same units. In centimeters, 17.6 becomes 5.6, which is a 56 mm bangle. Dealers who work in inches use the same arithmetic in different clothes: multiply the inch measurement by eight, because 25.4 divided by pi is 8.09.
4. Do it twice, on two different days if you can. Hands change size with heat, salt and time of day, and this is a number you will live with.

One honest caveat about the arithmetic, since we would rather explain it than dress it up. A folded hand is not a circle, and it compresses. So the calculation gives a very good first approximation and not a physical law, which is exactly why the trade rounds up when someone falls between sizes rather than trusting the number to the millimeter.

Inner diameter is the unit the trade quotes, and the second column is simply the first run backwards through pi, so you can find yourself from either end.

This surprises people, and it is pure geometry. A narrow band crosses your knuckles almost as a line: at any instant only a thin slice of the hand has to be inside it, and it can rock across one knuckle at a time. A wide band cannot. It has to contain a whole stretch of the hand at once, including the thickest part, and it cannot tilt its way past. If you are buying a broad, heavy bangle rather than a slim one, add a millimeter or two on top of what the calculator said.

The same single-piece geometry is why a wide bangle costs so much more than a narrow one, which is a different consequence of the same fact and is worked through on our page on what sets a jade bracelet’s price.

The standard shape is a true circle, and one number describes it. The other common shape is an oval, sold as a Guifei bangle after the Tang dynasty consort Yang Guifei, and it is quoted as two numbers: the long axis and the short one, as in 56 by 48. Because a wrist is itself oval, the shape sits closer and rolls less, which is the reason people choose it.

The catch is that an oval only passes the hand in one orientation, so the fitting is fussier and a size that works for one person's hand shape may not work for another's at the same circumference. If you are buying without trying it on, the round shape is the safer of the two.

There is a technique, it is not obvious, and it is the difference between a bangle that fits and a bangle that seems not to.

Put a thin plastic bag over your hand, fold the hand as you did to measure it, and work the bangle over the thumb-side knuckle first, then rock it across the rest. The bag is what jade sellers use rather than lotion, because it takes the friction out without leaving the stone greasy. Lotion or soap works too. Do it over a bed or a sofa, not over a stone floor, since the moment a bangle finally clears the knuckle is the moment it can leave your hand entirely.

Taking it off is the same process reversed, with two additions: raise your hand for a minute first so it holds less blood, and use cold water rather than warm. Rock, never pull.

And the thing that actually matters. If a hand is swollen or injured, or the bangle has begun to mark the skin, stop and go to an urgent care clinic or an emergency department. They can cut a bangle off safely and quickly, and they will be considerably happier doing that than treating a hand whose circulation has been cut off for an afternoon. A bangle is replaceable and a hand is not, and no piece of family jade is worth testing that.

A gold bangle can be cut open and re-soldered. A silver one can be gently sprung. Jade can do neither, and the reason is the thing that makes the object valuable in the first place: a real bangle is cut as a single continuous ring from one piece of rough, so a break is not a repair problem but the destruction of the property being paid for. A bangle that has been broken and joined with a metal band is a different object at a different price, whatever it looks like from across a room.

This is also why a jade bangle behaves like a piece of family property rather than an accessory. It goes on once, in most cases stays on, and gets handed to someone whose hand is near enough the same size. That the fit is unalterable is not a flaw in the design; it is most of why the object means what it means, which is the subject of our page on what wearing jade says.