A pretty fluorite stretchy bracelet - the batch we have at the moment have more purple and less green in them than the picture, they're lovely.
The chips average about 6mmx 3mm. Yours will be similar to the photos.
These bracelets are a medium size, but they are on elastic and do fit a bit bigger with a bit of a stretch but probably won't last so long..
I'd recommend taking these off when in the shower or bath as hot water can weaken the elastic!