How to Determine the Perfect Engagement Ring Size

Finding the right fit for your engagement ring is crucial, as this special piece of jewellery will be worn every day. Whether you’re selecting your own ring or planning a surprise proposal, it’s important to know how to get the size just right. Here are the key tips to help you determine the perfect engagement ring size.

Factors That Impact Engagement Ring Sizing

Several elements can influence ring sizing; the width of the band, finger shape, and even temperature. These factors are important to consider when measuring for a comfortable and secure fit.

Environment and Activity

Your fingers tend to swell in warm weather and shrink in the cold. It’s best to measure your ring size when your body temperature is normal to get the most accurate result. Avoid salty foods, hot drinks, or strenuous activity before you measure, as these can also cause your fingers to swell.

Finger Shape

If your fingers taper (wider at the base than the top), you’ll need to ensure a snug fit to prevent the ring from slipping off. For those with larger knuckles, it’s better to size the ring slightly looser to fit over the knuckle while still being secure at the base.

Band Width

Wider bands tend to fit more tightly due to the extra metal around the finger. If you’re choosing a thicker band, consider going up a quarter or half size to ensure comfort.

How to Measure Your Ring Size at Home

You can measure your ring size at home using several methods:

Printable Ring Sizer

You can download our ring size guide print it to scale, cut it, and measure your finger. Wrap the sizer around your ring finger and adjust it for a snug fit, then note the size.

Using an Existing Ring

If you already have a ring that fits the intended finger, you can place it against a ruler to measure its inner diameter. Compare the measurement to a size guide to find your ring size.

Plastic Belt Ring Sizer

These inexpensive tools can be ordered online and provide a highly accurate measurement. Simply adjust the plastic sizer on your finger and check the number displayed.

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How to Get Professionally Measured

For the most accurate measurement, visit a professional jeweller. They will use sizing rings to find the perfect fit, taking into account factors like band width and finger shape. It’s a good idea to size the engagement ring at the same jeweller who you wish to shop at, as they can ensure the size translates well to the specific band you choose.

Don’t want to leave it to chance? The AJC offers resizing service when you come to see us, so why not book an appointment to visit us at our London Showroom (just to make sure).

Guessing Your Partner’s Ring Size

If you’re planning a surprise proposal, guessing your partner’s engagement ring size might feel tricky, but there are a few ways to estimate it:

Ask Friends or Family

Someone close to your partner may already know their ring size or can help you figure it out.

Use a Photo

A jeweller can sometimes estimate ring size by looking at a clear photo of your partner’s hands.

Use a Current Ring

If your partner wears rings on other fingers, you can use one to estimate their size. Keep in mind that ring sizes can vary between fingers.

Engagement Ring Resizing

If the ring doesn’t fit perfectly, most jewellers can resize a ring by a few sizes. However, if the ring needs to be significantly enlarged or reduced, the jeweller may need to add or remove metal. Be cautious with eternity bands, which have diamonds all the way around—they can only be resized slightly. Frequent resizing isn’t ideal for the metal, so it’s important to get the size as close to perfect as possible.

By considering these factors and following these tips, you can ensure a comfortable and well-fitting engagement ring, whether you’re shopping together or planning a surprise proposal.

• Resizing an Antique Engagement Ring

Engagement Ring Sizing with The AJC

We are pleased to offer a Complimentary Sizing on all first ring purchases, undertaken by one of the best jewellers in the business. For all the details on our free resizing policy click here.

When to Resize

Sometimes it can be tricky find out your patrner’s engagement ring size without being caught. In these circumstances we recommend saving your free sizing until after you’ve proposed or the recipient has received their ring. Just send your ring back to us via secure post. Or…