Fingers swell in heat and after exercise, and shrink in the cold. A ring that slides on easily on a winter morning can stick by a summer evening. That's the whole reason sizing at home feels unreliable, and the fix is mostly about timing.
When to measure
Measure at the end of the day, when your hands are warm, and measure the same finger three times on different days. Use the largest number.
Two ways to measure
If you have a ring that fits the same finger, measure straight across its inside. If not, wrap a strip of paper around the base of your finger, mark where it overlaps, and measure the strip flat.
Try it
Find your ring size
EU 52
Between two sizes
Take the larger one, especially for wide bands, which feel tighter than thin ones in the same size. Each piece's own size chart wins over any general guide.
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