If you're unsure of your ring size, this what you need. Shipped for free.
Loop the sizer around your finger, thread it through the gap, like a belt and adjust to fit.
An ideal fit will feel comfortable and slide over the knuckle with a little force and effort. It's important it doesn't slide over the knuckle too easily, as this will mean the ring slides off and you could lose it (pinky fingers are notorious for this).
We measure our rings in the standard US sizes, however the Ring Sizer measures in Euro sizes. Check our conversion chart to get your ideal size.