Ring sizing is the conversion that matters most, because the ring is bought once and the finger is the only standard that counts. Different regions number their sizes differently, so the same finger has three names.
Convert finger circumference and diameter to US, UK, and EU ring sizes. Measure carefully, take the larger value when in doubt, and convert to the country the ring ships from before you enter the number.
Try it now: open the free tool, runs 100{ddff9936f8333f09603555df7bd6492034f3a4a35de784276d3cf3d66166a113} in your browser.
Bottom line: measure the finger, convert the size, confirm before you commit.
Your turn: use the tool free here, no signup, nothing leaves your device.
How do you use Ring Size Converter?
Open the Ring Size Converter in your browser (Circumference to ring size). Type or paste your input, adjust the options, and copy the result. Everything runs locally on your device with no account and nothing stored, so the three steps below take seconds even for confidential work.
- Paste or type the value you want converted into the input box.
- Pick the units or format you are converting between.
- Read the converted result and copy it with the copy button.
Try Ring Size Converter free. It opens right in your browser.