Tips & Advice
Ring size guide
Trouvez votre taille exacte en 2 minutes — ou passez nous voir pour une mesure gratuite au Plateau Mont-Royal.
Finding the right ring size is the foundation of a comfortable piece of jewellery you will wear every day. In Canada, ring sizes are expressed in numbers (3 to 14) — the same system as in the United States and Mexico. The average size for a woman is between 6 and 7, and between 9 and 10 for a man. Here are three simple methods to find yours from home — or come see us on Plateau Mont-Royal for a free measurement with a professional ring sizer.
Three ways to find your size
Method A — String or paper strip
Wrap the base of your finger with a non-elastic string or a strip of paper. Mark the overlapping point. Measure the length in millimetres with a ruler. Divide the circumference by 3.14 to get the diameter. Compare in the table below. The string should hold without squeezing — it should pass over your knuckle without forcing.
Method B — Use an existing ring
Place a ring that fits you well (worn on the same finger) on a sheet of paper and trace the inside of the circle. Measure the inner diameter in millimetres with a ruler. Find the match in our table. Choose a ring worn on the left ring finger for an accurate measurement — it is the most common finger for engagement rings and wedding bands.
Method C — Free in-store measurement (recommended)
The most reliable method remains the professional ring sizer. Come see us at 1144, avenue du Mont-Royal Est — the measurement is free, no appointment needed, and takes less than 5 minutes. Ralph and the team will also advise you on the ideal band width for your comfort and lifestyle.
Ring size chart
| US/CA Size | Diameter (mm) | Circumference (mm) | EU | UK/AU |
|---|---|---|---|---|
| 3 | 14,0 | 44,0 | 44 | F |
| 3,5 | 14,4 | 45,5 | 45,5 | G |
| 4 | 14,9 | 46,8 | 47 | H |
| 4,5 | 15,3 | 48,0 | 48 | I |
| 5 | 15,7 | 49,3 | 49 | J |
| 5,5 | 16,1 | 50,6 | 50,5 | K |
| 6 | 16,5 | 51,8 | 52 | L |
| 6,5 | 16,9 | 53,1 | 53 | M |
| 7 | 17,3 | 54,4 | 54 | N |
| 7,5 | 17,7 | 55,7 | 55,5 | O |
| 8 | 18,2 | 57,0 | 57 | P |
| 8,5 | 18,6 | 58,3 | 58 | Q |
| 9 | 19,0 | 59,5 | 59 | R |
| 9,5 | 19,4 | 60,8 | 61 | S |
| 10 | 19,8 | 62,1 | 62 | T |
| 10,5 | 20,2 | 63,4 | 63,5 | U |
| 11 | 20,6 | 64,6 | 65 | V |
| 11,5 | 21,0 | 65,9 | 66 | W |
| 12 | 21,4 | 67,2 | 67 | X |
| 13 | 22,3 | 70,0 | 70 | Z |
If your measurement falls between two sizes, choose the next half-size up. A slightly larger band is always more comfortable than one that is too tight.
Tips for an accurate measurement
Measure at the end of the day. Your fingers are at their natural size in the evening, slightly larger than in the morning. It is the best time to get a measurement representative of daily wear.
Take 3 to 4 measurements. Space them across different times of day to confirm the size. A single measurement can be skewed by temperature or recent activity.
Watch the temperature — especially in Montreal. In winter, your fingers are thinner and can lose half a size. In summer, they swell slightly. Measure at a comfortable indoor temperature (19–22°C) for a reliable result in any season.
Wide band = half a size up. A band of 5 mm or more covers more surface and fits more snugly than a thin band. Add half a size for any band of 5 mm and above.
Knuckle vs. base of the finger. If your knuckle is noticeably wider than the base of your finger, measure both and choose an in-between size. The ring must pass the knuckle without forcing while staying snugly in place at the base.
"I have seen hundreds of clients come back for an avoidable adjustment. My advice: if you are hesitating between two sizes, go with the larger one. You can always size a band down, but sizing it up costs more and is not always possible."
Finding the size in secret
Planning a marriage proposal? Here are five discreet ways to find your partner's size without raising suspicion.
- Borrow one of their rings. Pick one worn on the left ring finger, trace the inside on paper, and bring us the drawing or the ring directly. It is the most accurate method.
- Ask someone close. A sister, a friend or a parent can ask the question naturally in conversation — without raising any suspicion.
- The finger technique. Slide one of their rings onto your own finger and mark where it stops. Bring that reference to the jeweller — Ralph can estimate the size from that indication.
- Impression in soap or clay. Press the inside of one of their rings into a dry bar of soap or modelling clay. The impression is enough for an accurate measurement.
- Order an average size. In absolute doubt, go with a size 6 (women) or 9 (men) — the best-selling sizes. At Diplomate, we offer a free adjustment within 30 days of purchase.
Have a specific idea in mind? Discover our custom creation service — Ralph designs the ring of your dreams from start to finish.
Frequently asked questions
La taille moyenne pour une femme est entre 6 et 7 (6,5 étant la plus vendue). Pour un homme, entre 9 et 10. Ces chiffres sont identiques aux tailles américaines — le Canada et les États-Unis utilisent le même système numérique.
Choisissez toujours la demi-taille supérieure. Un jonc légèrement ample est plus confortable qu'un jonc trop serré, surtout par temps chaud ou après un effort physique. Il est toujours plus facile de rétrécir légèrement qu'agrandir.
Oui. Vos doigts gonflent en été et rétrécissent en hiver. Ils sont aussi plus larges en fin de journée, après l'exercice, ou en période de rétention d'eau. Mesurez à température intérieure confortable, en soirée, pour une mesure représentative du port quotidien.
Oui. Un jonc de 5 mm ou plus couvre davantage de surface et serre davantage qu'un jonc fin. Prévoyez une demi-taille supplémentaire par rapport à votre mesure habituelle pour tout jonc de 5 mm et plus.
Oui. Chez Bijouterie Diplomate, le premier ajustement est offert dans les 30 jours suivant l'achat pour la plupart de nos bagues. Certains modèles (éternité complète, tungstène) ne peuvent pas être redimensionnés — nous vous le précisons avant l'achat. Contactez-nous au 514 524-2233 pour plus de détails.
Absolument. Passez au 1144, avenue du Mont-Royal Est sans rendez-vous. La mesure prend moins de 5 minutes avec un baguier professionnel, et vous repartez avec votre taille exacte — sans engagement d'achat.
Non. Le Canada et les États-Unis utilisent exactement le même système numérique. Les tailles européennes (EU) et britanniques (UK/AU) sont différentes — consultez notre tableau de conversion complet sur cette page.
Empruntez discrètement une de ses bagues portée à l'annulaire gauche, tracez-en l'intérieur sur du papier, et apportez-nous le dessin. On s'occupe du reste. Consultez notre section « Trouver sa taille en secret » plus haut sur cette page pour d'autres astuces.
Need an accurate measurement?
Passez nous voir au 1144, avenue du Mont-Royal Est. Mesure gratuite, sans rendez-vous, en moins de 5 minutes.
In store
1144 Avenue du Mont-Royal Est
Montréal, QC H2J 1X8
(514) 524-2233
Tue–Fri: 10:30am–6pm
Sat: 10:30am–5pm
Sun–Mon: Closed