How to Find Her Ring Size (Without Spoiling the Surprise)

Planning a surprise proposal is exciting. Figuring out her ring size without giving it away is a little less fun. Don't worry: here are the most reliable ways we know, from easiest to sneakiest, plus what to do if you're still not sure.

1. Borrow a ring she already wears

This is the most accurate secret method. Borrow a ring she wears regularly on the same finger (ideally her left ring finger) and bring it to us. We can measure it on a ring mandrel in a minute. If you can't take it out of the house, try one of these:

• Trace the inside of the ring on paper with a sharp pencil.
• Press it into a bar of soap or a bit of clay to make an impression.
• Slide it onto your own finger and mark with a pen where it stops.

Note: a ring from a different finger or hand can be a different size. Dominant hands are often slightly larger.

2. Ask a friend or family member

Her best friend, sister or mom may already know her size, or can find out naturally ("Let's go try on rings for fun!"). Just make sure they can keep a secret.

3. Use a printable sizer or string, carefully

Printable ring sizers and the string method can get you in the ballpark, but they're less accurate. String and paper can stretch or be wrapped too tightly. If you use one, treat the result as an estimate, not a final answer.

4. Go with a common size, and plan to resize

If you truly can't find out, many people choose a common size and plan to adjust it after the proposal. Most simple gold and platinum bands can be resized. Some designs, like eternity bands or rings with stones all the way around, are difficult or impossible to resize, so tell us if you're unsure and we'll help you choose a style that can be adjusted.

Tips for an accurate fit

• Time of day and temperature matter. Fingers swell when it's warm (hello, Miami) and shrink when it's cool. Measure when she's comfortable, not right after a workout.
• Knuckles count. The ring needs to slide over the knuckle and still sit snugly at the base.
• Wide bands fit tighter. A wide band usually needs a slightly larger size than a thin one.
• Snug, not tight. A good fit goes on with a little push and comes off with a little twist.

When in doubt, size a bit bigger

A ring that's slightly loose is safer than one that won't go over her knuckle on the big day, and it's usually easier to make a ring a bit smaller than much larger.

Let us help

Bring her ring, your best guess, or just your questions to our Downtown Miami store. We'll measure, suggest designs that are easy to resize, and help you plan the rest. Still choosing a style? Our Ring Matchmaker quiz and diamond shapes guide are great places to start.

Quick answers

What if the ring doesn't fit after the proposal? Bring it to us. Most plain-shank gold and platinum rings can be sized up or down.

Can I just guess based on her glove size? It's not reliable. Finger size doesn't track neatly with glove or clothing size.

Should I bring her in after? Yes! A quick in-person sizing after the "yes" guarantees a perfect, comfortable fit.