Pictured: Adjustable Hearts Gold Ring
To measure ring size at home: wrap a strip of paper around the base of your finger, mark where it overlaps, measure the length in millimeters, and match it to the chart below. That's your circumference โ a US size 7 is 54.4mm.
US Ring Size Chart (Circumference)
| US Size | Circumference (mm) | Diameter (mm) |
|---|---|---|
| 5 | 49.3 | 15.7 |
| 6 | 51.9 | 16.5 |
| 7 | 54.4 | 17.3 |
| 8 | 57.0 | 18.1 |
| 9 | 59.5 | 18.9 |
How Tight Should a Ring Fit?
Right fit: slides over the knuckle with slight resistance, sits snug at the base without pinching, and comes off with a firm pull. Fingers swell in heat and shrink in cold โ measure at the end of a normal-temperature day for the truest reading. If you're between sizes, size up for wider bands, down for thin ones.
Three At-Home Methods, Ranked
Paper strip (above) โ accurate within half a size. Existing ring โ trace the inside circle of a ring that fits and measure the diameter; best for buying a surprise gift. String โ works, but stretchy string overestimates; paper beats it.
Or Skip Sizing Entirely
Adjustable and open-band rings fit a range of sizes, solve the gift problem, and move between fingers. They're also the practical answer for stacking, where each finger position wants a different size.
Where That Leaves You
That standard is what Ezra Gems is built around: hypoallergenic, waterproof, tarnish-free pieces designed for women who put jewelry on and forget about it. Many of our rings are adjustable โ browse rings without the sizing anxiety. Shop Ezra Gems.
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