Ring Size Chart Canada: How to Measure Your Ring Size at Home

Ring Size Chart Canada: How to Measure Your Ring Size at Home

Ordering a ring online, planning a proposal, or picking wedding bands, it all starts with one number you probably do not know off the top of your head. You can find it at home in a few minutes with things you already own.

This guide covers the three methods that actually work, the full Canadian size chart in millimetres, and what to do if you need to size someone's finger without them noticing.

Use the free ring sizer below

The fastest method needs nothing but your phone and a bank card. Calibrate the screen once with the card (every bank card on earth is the same standard size), then lay a ring that already fits on the screen and match the circle to it. You can also enter a paper strip measurement, or print a true-to-size paper sizer.

Online ring sizer

Calibrate once with any bank card, then size a ring right on your screen. A phone works best.

Stand any bank or credit card upright against the outline below, then drag the slider until the outline is exactly as tall as your card. Every card is the same standard size, 85.6 mm tall this way.

Your card, standing upright

It matches my card

Tip: A phone screen works better than a laptop for this. Open this page on your phone, calibrate, and the circle you match is accurate to a fraction of a millimetre.

How ring sizes work in Canada

Canadian jewellers use the US numeric scale, where each full size adds 0.81 mm to the ring's inside diameter. When a jeweller measures a ring, they measure that inside diameter in millimetres, straight across the widest part of the opening.

A few chains with UK or Australian roots, like Michael Hill, list letter sizes instead. The chart further down converts between all of them, but if you shop in Canada you will almost always be asked for a number like 6.5, or the measurement in mm.

Method 1: The paper strip

This measures your finger directly, which is the way to go if you do not own a ring that fits the right finger.

1. Cut a strip of paper about 10 cm long and no wider than 1 cm. Thin paper works better than card.
2. Wrap it snugly around the base of your finger, just below the knuckle. Snug means it stays put but still slides over the knuckle.
3. Mark the exact point where the end overlaps.
4. Lay the strip flat and measure from the end to your mark in millimetres.
5. That number is your inside circumference. Enter it in the sizer above or look it up in the chart below.

If your knuckle is clearly wider than the base of your finger, measure both and pick a size in between. The ring has to clear the knuckle, then not spin freely once it is on.

Method 2: Measure a ring you already own

If you have a ring that fits the right finger well, measure it instead of your finger.

1. Grab a ruler with millimetre markings.
2. Measure the inside of the ring, edge to edge across the centre. Do not include the metal itself.
3. Match that inside diameter to the chart below.

This method is only as good as the ring you measure, so use one you actually wear on that finger. A ring that fits your middle finger tells you nothing about your ring finger, and left and right hands are often a half size apart.

Method 3: Print our free ring sizer

If you would rather work with paper, the sizer tool above has a print button that generates a free printable sheet with true-to-size circles for every size from 3 to 13.5. Lay a ring over the circles and the one that exactly fills the inside of the band is your size.

Make sure of two things when you print:

• Print at 100 percent scale. Choose "Actual size" in your print settings and turn off "Fit to page".
• Check the scale before trusting it. The sheet has a bank card outline and a 100 mm ruler printed on it, so you can confirm the printout came out true to size in two seconds.

You can also use the whole toolkit any time at weddinghelp.ca/ring-sizer.

Canadian ring size chart in mm

Diameter is the distance across the inside of the ring. Circumference is the distance around your finger, which is what the paper strip gives you. UK and EU columns are close equivalents for shopping abroad.

Note: UK letter sizes past Z vary between jewellers, so treat the top of the letter column as a guide rather than gospel.

How to find someone's ring size in secret

For a surprise proposal, there are a few reliable ways to get the size without asking.

Borrow a ring they already wear. The classic. Take a ring from the correct finger (left ring finger for an engagement ring), and either measure it quickly with the tool above or trace the inside circle on paper for a jeweller. Return it before it is missed.

Press it into something soft. A bar of soap works. Press the ring straight down, lift it out, and bring the imprint to a jeweller. Sliding the ring down a tapered candle until it stops works too, then mark the spot.

Recruit help. A friend, sister, or mom can find out over a casual jewellery conversation or a "try this ring on" moment and report back.

When in doubt, go bigger. Sizing a ring down is easier and usually cheaper than sizing up. A 6.5 or 7 is the safest guess for a Canadian women's engagement ring if you truly have nothing to go on.

Tips for getting the fit right

• Measure at the end of the day. Fingers are smallest in the morning and largest in the evening. Evening measurements fit more reliably.
• Mind the temperature. Cold fingers shrink noticeably. Warm up before measuring, and do not measure right after a workout or a hot shower either.
• Measure two or three times. If you get the same number twice with the paper strip, trust it.
• Wide bands run snug. For bands 6 mm and wider, most people need about half a size up from their normal size.
• Left and right differ. Your dominant hand usually runs about half a size larger. Measure the exact finger the ring will live on.
• Between sizes? Go up. A slightly loose ring can be fixed cheaply. A ring stuck behind your knuckle cannot.

What if the size is still wrong?

A wrong size is a quick fix in most cases. A simple gold band typically costs about $60 to $130 to resize at a Canadian jeweller, with silver a little less and platinum more. Many jewellers include one free resize within the first months after purchase, so ask before you pay.

The exception is eternity bands and channel-set rings, where stones run around the band. Those can cost $150 to $300 or more to resize, and some cannot be resized at all. If you are guessing a size for a surprise, guess on a solitaire or plain band, never an eternity ring.

Ring sorted. Now the rest of the wedding.

Once the ring fits, the fun part starts. Our free planning tools handle the guest list, budget, and vendor tracking, and the vendor matchmaker connects you with photographers, venues, and planners across BC. If the proposal just happened, start with how to get married in BC.