Here is a tool for Measuring bracelets.
A bracelet mandrel is a very useful tool for Jewelry Artisans. It can be used to double check the size of a bracelet for labeling.
The photo shows a DIY bracelet mandrel. It is a matter of marking a cone with the measurements. Drop the bracelet onto the cone and view the measurement.

Wow, what a good idea, I used to machine kni and still have empty cones and I am now into jewelry making this is a really great idea, thank you
Gwen U. K.
thanks a lovely blog I like to wire work too ,jane from the machine knitting list