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I've recently gotten very into ebay - I love picking up bargains there, and recently I've been eyeing up the jewellery section, with the idea of treating myself a little. The trouble is, with rings in particular, you do need them to be the right size, otherwise you risk ending up with something you can't wear without paying for expensive alterations, or something that might slip off and be lost. So, I decided to purchase a ring sizer.
Essentially, this is a device made of thin white plastic that fans out to provide various holes for you to pop your finger into, and the setting where it fits fairly tightly over the joint of the finger is the size you need. It's all fairly simple, and those are the full instructions you get with the product. It should be noted that this only goes from sizes K-Z, so doesn't cover child sizes, and depending on the slenderness of your fingers, may not be suitable. However, as quite a chunky fingered person myself, I found this very easy to use to get my measurements, which has enabled me, for the most part, to buy rings that fit.
I do have one or two gripes with this though- whilst we in the UK label ring sizes alphabetically, the US use numbers, and it would have been handy for this to have the numbers as well as the letters, or to come with some kind of conversion chart. It also feels quite flimsy - whilst it's fine for occasional personal use, I don't imagine this lasting long if used frequently, by a jeweller for example. And of course, it is only useful if Ebay sellers know the ring size in the first place, which isn't always the case.
For 1.95 including delivery from Amazon, I do think this is a good investment - it's already stopped me from buying two rings that totalled £70, and would have cost almost as much again to alter to fit, so it has paid for itself. It's very handy for anyone who may be buying rings online, and is small enough to be tucked away in my jewellery box so I know where it is between uses.
4 stars - has saved me money already, but I wish is came with a conversion chart to deal with US and European sizing.