How to find her ring size (without her knowing)

Everything has run smoothly so far. After spending months window-shopping and browsing online, in discussion with her best friends, store assistants (and very possibly your bank manager), you’ve taken the plunge and bought the diamond ring of her dreams.

It’s the style and design she’s always wanted, it’s the perfect cut, and it’s priced inside your budget; only just, but even so, you can afford it. Ring bought, you pop the question – the single most important question you’ll ever ask in your life – and she says… she says yes! It’s a beautiful moment, for both of you. You proudly present the ring, she gasps in admiration, slides it onto her finger, and…

… it gets stuck. Lodged on the middle knuckle, it stubbornly sits there, refusing to budge. Or, a different end result – it’s too big, rattles around her finger and falls off, bouncing across the floor, as soon as your brand new fiancée lowers her hand.

All very embarrassing. The moral of the story? Don’t neglect the importance of getting the size of the ring right. But that’s easier said than done, so how do you find her ring size, without her knowing?

It can be achieved. Think of it as some kind of secret stealth mission, and deploy some of the following tips:

If your partner has other rings that she rarely wears, discretely borrow one and take it with you when you go to the jeweller’s. Make sure it’s one that won’t be missed. It might not be the exact measurement of the traditional wedding finger because the chances are she’ll wear this other ring on her right hand, for example, but it won’t be far off.

This article suggests taking a piece of paper or string, and wrapping it around her finger while she sleeps before marking where the two ends overlap. Risky – as the piece admits, this is probably only worth doing if your partner is a heavy sleeper. If she wakes, you’ll be well and truly rumbled.

Again, borrow a current ring but instead of physically taking it anywhere, place it on paper and draw around the inside of it with pencil. Then take the piece of paper with you when you buy the ring. To be properly precise, use the size guide on the 77 Diamonds website. This is a printable guide with ring sizes included on it for easy comparison.

Ask a friend, says Your partner’s closest friends can be your ally when it comes to insider information on ring buying. If the two of them have never spoken about such things – which would be a surprise – then you can always encourage a girly shopping trip to try on rings and ask for the details to be fed back to you. The problem with this is that your girlfriend’s proposal radar might be twitching though it depends how clever her friend is.

If you’re completely flummoxed, don’t panic. Discuss the situation with the jeweller you’re buying from and they’ll probably advise on getting a ring within the average size range. They should offer a first resize for free.