Find Her Ring Size

Below you find several options to find her ring size, depending on whether you have any help from accomplices, whether the ring can leave the house or not, and even when she doesn’t wear rings!

Borrow her ring

If you can get your hands on one of her rings you can take it to a jewelers and get it measured. You will need to be sure that the ring actually fits her properly and that it is worn on the correct finger (left ring finger for engagement rings in the US), as all fingers are different sizes and there tends to be a size difference between the left and right hand (dominant hands tend to be slightly larger in size). If she does not wear a ring on that finger you can settle for an estimated measurement for another finger, but keep in mind the ring may need to be re-sized.

When you can't borrow her ring 

When she does wear rings, but you are unable to take her ring to a jeweler without her noticing it’s missing, there are several ways you can estimate the size without taking the ring out of the home. Good times for these are when she takes of her rings before she goes to bed, before she has a bath or before she dyes her hair. You can try the ring on yourself and mark on the inside of your finger where it falls. Then you can print my free ring sizer ( (just sign up for the newsletter in the footer and you will receive it instantly) on a thick paper and find the size that falls in the same place. 

Alternatively, you can try the secret soap test. Basically, you grab a bar of soap, and press her ring into a bar of soap to make an impression of the size. At the end of the night when she takes off a ring she wears, or when you manage to steal it from her when she is sleeping, press it into a bar of soap to create an imprint of the size. Make sure to carefully rinse it off and put the ring back where you found it (also, leaving the soap out with the ring imprint may spark questions!) Then, all you have to do is match the inside of the band to an online size chart like this one here to get a starting measurement for her finger. 

When she does not ever take her rings off 

Can you not borrow one of her rings, even for the soap bar test? Tell her that you just read that if you take your shoe size and divide by two and then add two, you get your ring size. Have her walk through the calculations to see if it is correct for her and hopefully she will tell you her actual ring sizeThis equation doesn’t actually work, but you will get her talking without directly hinting that you may be buying her a ring.

When she wears no rings

If she wears no rings it becomes a little more difficult. But not impossible. While she is in deep sleep, use my printable ring sizer (just sign up for the newsletter in the footer and you will receive it instantly) to measure her finger. Just make sure she’s not a light sleeper. Some cocktails usually help.
Another option, but with the risk of giving it away if you don’t package it well enough as a spontaneous need, you can ask her to try on a ring that you want to buy for someone else, such as for your sister or your mother. If one of your partner’s friends is engaged, you can ask her friend to let your girlfriend try on the ring. This will give you rough idea of the size if you don’t mind asking her friend for the size. You can also use this as an opportunity to ask what she thought of her friend’s or the giftee’s ring and probe what style of ring she would like for herself.

Some tips

  • If you have a particular finger you want purchase a ring for, please bear in mind there tends to be a small size difference between the left and right hand.
  • When in doubt, size up! A ring is easier to resize if it is too big, although not all my rings can easily be resized, so please ask before you buy.
  • The most common women’s ring finger size is 6 to 6.5 
  • Wider rings have a tighter fit than thinner bands


Now that you know her ring size, check out our entire selection of rings!