Salt and Pepper Diamond engagement ring

Not everyone knows their ring size, and it can be really hard if you're buying a ring as a gift for someone else. 

If you're buying an engagement ring and don't know what size you need it can be daunting. But never fear, I'm here to help. I've got some handy hints to find out your ring size, and perhaps even more useful, sneaky ways to find out some else's!​

How do I know my ring size?

Unlike earrings or necklaces where generally one size fits all, rings come in lots different sizes to accommodate lots of different finger sizes. Here at Bonearrow, I make most rings to order, in whatever size you are, so if you have tiny fingers or larger fingers (or 'sausage fingers' as lots of people say about theirs!) you can still find a ring that will fit you perfectly. There really is no such thing as a normal finger size! That's why I make rings in every size, no one is left out, even if you usually struggle to find rings that fit.

What if I only know my ring size in numbers?

In the UK we use letters as finger sizes that go from A to Z. After Z they are numbered Z1, Z2 etc. 

American ring sizes are numbers from 3 to 14 ish, Canada is the same, whereas European sizes are also numbers, but go from 38 to 70+. Pandora ring sizes are based on European sizing.

If you need know your ring size in letters or want to convert your EU, Pandora or US ring size in numbers to letters you can convert it to a UK size using the chart below.
Ring size conversion chart UK
If you're a half size though (yes, you can be a half size!), an S 1/2 for example, just write in your order notes that you'd like an S 1/2 and I'll make it exactly that.

What if I don't know what size I am at all?

Well then, luckily for you we have a useful little tool that can help with that! If you have no idea what size you are I can send you a little plastic ring sizer that you can use to measure your finger and give your size in UK letters. You can order one here.

But, what if I need to find out someone else's ring size, you know, on the sly?!

Don't worry, I got you. Trust me, I've done this before. There's a few things you can do if you want to find out someone's ring size without them knowing...
Here's my top 5 sneaky sneaks:

1) The easiest way is to borrow a ring they already have that fits, take it to a jewellers and they will tell you the size.
​2) Get my ring size cheat sheet and use an existing ring of there to check the size. This way isn't quite as foolproof as number one, but if you can't get to a jewellers this is your next best option. Just send me an email at and I'll send you the free PDF.
3) Ask their friends or family - sounds obvious but someone might have already done the hard work here, so you don't have to! 
4) Ask someone with similar sized fingers what their size is - This is tricky because it requires a very good judge of hand size. Fingers can be quite different and even a couple of millimetres can make a difference... But, it's an option and it sometimes works.
​5) Buy one of our aforementioned Ring Sizers and covertly put it on their finger while they're sleeping. Hmm, on second thoughts, you're better off with any of the above.
If you are still none the wiser and have to guess, I'm are happy to exchange most rings for a different size if it doesn't fit perfectly, so long as it isn't a custom make or one of a kind. If you chose a bespoke engagement ring and it isn't a perfect fit, I will resize it for free for you.
Still got questions? Email me at and I'll send you