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Ring madrel
Ring madrel  

Ring mandrel
Ring mandrel  
Attached is a picture of a ring I bought at Tiffany & Co, the reciept says it's a size 7.  I bought the mandrel on eBay and it looks like a 7 to me but someone told me they wear a 7 and this ring must be a 6.5.

I realize the mandrel pictured if cheap and but I have verified the finger rings hit on the lines of mandrel perfectly.

Jacqueline, in the photo your mandrel is measuring a 7. It must be correct according to the measure Tiffany took(if they did measure your finger because it fits.   For reassurance, go to a jeweler ans ask if it is ok to compare your mandrel with their finger sizing rings.  It is not unusual for a mandrel to be off a LITTLE.  i have a calibrated set and that was fairly expensive.

The ring should be round to measure correctly.  God Bless.  Thomas.

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Have a question about jewelry repair or working with precious metal jewelry and gemstones? For many years up to December 31, 2010, I was a working professional bench jeweler, involved everyday with setting stones in mountings, designing and making jewelry, repairing and limited custom manufacture. If you work with jewelry as a hobby or as a profession, I might be able to help. I deal with the retail business, not mass production. Ask privately if you wish. See the box for that: It keeps your question between us. Please DO NOT ask MAKER'S MARKS, but metal quality marks are fine to ask. Please DO NOT ask diamond prices. See a gemologist for that.


I have extensive experience in design, service and making of jewelry. I deal mostly with precious metals and gemstones but work with many materials as needed and usable to create an artistic design. My experience also includes freelance photography and photographer of jewelry and similar items for a former employer and individuals. Design of custom items requires reading the desires of the client and being clear on what can be done within that framework...then fulfilling the transition of idea to reality. Effective communications is essential in a working designer/producer and customer relationship.

Education is English/Physics! Started in human resources, to advertising, to, what a road. I have had formal training in jewelry work and many shared experiences with top grade jewelers. We just never know were we will go or be. Follow your best, your dreams, with some discretion! Don't let the work tear up your body along the way as it has mine.

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