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RING SIZE Tips & Tricks: Buy a plastic ring-sizing gauge or follow these easy steps to know your ring size.



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  • Materials: plastic, plastique

Here are a few easy steps to help you figure out your ring size:

The BEST way to know your size is to go at your local jewelry shop to try different sizes. Try a ring about the same width as the ring you want to buy online.

You can buy a plastic ring-sizing gauge. You only need to add this item to your cart and proceed to checkout to receive it by the mail.

If you buy a ring sizing gauge and you want to order a ring band 5mm or wider you must add ½ size to get the good size.
(Example a size 6 with a plastic gauge will equal to a size 6 on a 3mm wide ring, but a 6 1/5 size on a 5mm ring band.)

If you already have a ring that is the right size for you, it is possible to estimate your ring size from it. The ring must be about the same width as the one you want to purchase.
If the ring you have is thinner than the ring you want to order; add ½ size and vice-versa.
(Example a size 6 on a thin ring will equal to a size 6 on a 3mm wide ring, but a 6 1/5 size on a 5mm or wider ring band.)

This method is no the best way to know your ring size, but it does help a lot if every step is well executed. It is usually close to ¼ to ½ size.
It is a good way to get the ring size of someone else for a surprise gift.

You will need a paper, a fine pen or pencil and a rule with millimeters.

1. Place the ring on a paper sheet
2. Trace the interior border with a fine pencil
3. Measure the diameter* (∅) of that circle OUTSIDE the lines.

*The diameter (∅) represents a line connecting the largest points of the circle, passing trough the center.

The measure you get outside the circle should be the same has inside the ring.
Here are the different sizes matching their diameter (∅) inside.

Size 4.00 = 14.78 mm ∅
Size 4.25 = 15.00 mm ∅
Size 4.50 = 15.28 mm ∅
Size 4.75 = 15.40 mm ∅

Size 5.00 = 15.72 mm ∅
Size 5.25 = 15.80 mm ∅
Size 5.50 = 16.16 mm ∅
Size 5.75 = 16.30 mm ∅

Size 6.00 = 16.58 mm ∅
Size 6.25 = 16,70 mm ∅
Size 6.50 = 17.04 mm ∅
Size 6.75 = 17.10 mm ∅

Size 7.00 = 17.30 mm ∅
Size 7.25 = 17.50 mm ∅
Size 7.50 = 17.70 mm ∅
Size 7.75 = 17.90 mm ∅

Size 8.00 = 18.23 mm ∅
Size 8.25 = 18.40 mm ∅
Size 8.50 = 18.59 mm ∅
Size 8.75 = 18.75 mm ∅

Size 9.00 = 18.90 mm ∅
Size 9.25 = 19.20 mm ∅
Size 9.50 = 19.44 mm ∅
Size 9.75 = 19.60 mm ∅

Size 10.00 = 19.88 mm ∅
Size 10.25 = 20.00 mm ∅
Size 10.50 = 20.27 mm ∅
Size 10.75 = 20.40 mm ∅

Size 11.00 = 20.60 mm ∅
Size 11.25 = 20.80 mm ∅
Size 11.50 = 21.13 mm ∅
Size 11.75 = 21.20 mm ∅

Size 12.00 = 21.45 mm ∅
Size 12.25 = 21.60 mm ∅
Size 12.50 = 21.80 mm ∅
Size 12.75 = 22.00 mm ∅

Size 13.00 = 22.30 mm ∅
Size 13.25 = 22.40 mm ∅
Size 13.50 = 22.60 mm ∅
Size 13.75 = 22.80 mm ∅

Size 14.00 = 23.14 mm ∅
Size 14.25 = 23.30 mm ∅
Size 14.50 = 23.50 mm ∅
Size 14.75 = 23.70 mm ∅

Size 15.00 = 23.88 mm ∅

I use US Sizes, which are mostly used in USA and Canada.

If you order a ring but the size doesn’t fit, it is always possible to make a ring size adjustment.
You can visit your local jewelry shop to have them resize your ring, or you can send it back to us for a re-size. Charges may apply; shipping is at your charges.
Take a look at my policies for more details:




If you order today, this is the estimated delivery date and is based on the seller's processing time and location, carrier transit time, and your inferred delivery address. Keep in mind: delivery company delays or placing an order on a weekend or bank holiday may push this date.

15 Feb-01 Mar

06 Feb

After you place your order, MCDecarie will take 2-7 business days to prepare it for dispatch.

08-15 Feb

MCDecarie puts your order in the post.

15 Feb-01 Mar

Estimated to arrive at your doorstep 15 Feb-01 Mar!

Cost to deliver


Etsy offsets carbon emissions from delivery and packaging on this purchase.
Etsy offsets carbon emissions from delivery and packaging on this purchase.
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Dispatches from Canada

Marie-Claude Décarie

Marie-Claude Décarie

Owner of MCDecarie

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This seller usually responds within 24 hours.

Actively selling in United States

Shop has made 12 sales to buyers in United States in the past 30 days.

1,733 reviews

5 out of 5 stars
5 out of 5 stars

Very easy? use, has it happened? super fast in addition! It's really reassuring to have this little gadget to prepare for your order!

Karine Larose 28 Jun, 2016

5 out of 5 stars

My order arrived super fast and I love everything about this shop. I can't wait to order our wedding bands from MCDECARIE. You will not find a better place to order your rings from.

Lisa Smith 22 Sep, 2015

5 out of 5 stars

I received this item so quick! Ordered our wedding bands tonight and I couldn't be more excited to see them!!

Katie Bell 09 Jul, 2015

5 out of 5 stars

Such a fabulously handy tool to ensure the right size when ordering rings from this shop. Everything fits exactly as I expected it to.

Jenna Lis 14 Oct, 2015

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