Canada Bra Size Calculator
Measure your band and bust to estimate a Canadian bra size, then check whether the brand you are shopping uses US-style, UK, EU, or French labels.
Canadian calculator
Enter snug underbust and full bust measurements to estimate a Canadian starting size. The calculator uses US-style inch bands because that is the most common label style in Canadian retail.
Canadian size labels often look like US labels, but Canada shoppers commonly encounter UK full-bust brands, European labels, and French-language size charts. Treat the result as a practical starting point and confirm against the brand chart.
Bra size calculator
Two measurements. A starting size for your fit.
For the most accurate fit, wear a non-padded bra and stand naturally.
Snug around your ribcage, below your bust.
Around the fullest part, without pulling tight.
Want a more detailed estimate? Use 6 measurements
Quick answer
To calculate a Canadian bra size, measure snugly around the ribcage for the band, measure around the fullest part of the bust, then compare the difference using the cup sequence used by the brand. In Canada, many everyday labels follow US-style sizing, but UK and EU brands are common enough that the size system still matters.
Use inches for the simplest Canadian retail estimate, or centimetres if that is how you measured.
Canadian stores often show 32, 34, 36, and 38 band labels, similar to US sizing.
US-style cups may use DD and DDD/F, while UK brands sold in Canada may use DD, E, F, FF, G.
Canadian bra sizing usually looks very similar to US sizing: an inch-based band number plus a cup letter based on the difference between bust and underbust. The tricky part is shopping across brands, because Canadian retailers often sell local, US, UK, and European labels side by side.
Wrap the tape around your ribcage directly under the bust. Keep it level and snug. If you measured in centimetres, you can still enter centimetres in the calculator.
Measure around the fullest part of the bust while keeping the tape level across your back. Avoid compressing tissue, especially if you are wearing a firm sports bra or padded bra.
Use the calculator result as a Canadian starting size, then confirm the brand's system. A Canadian retailer may list a US-style 34DDD/F, a UK 34E, or an EU 75F for similar cup volume.
Canada does not have a separate universal cup sequence. Many Canadian labels follow US-style cups, while UK brands sold in Canada often use UK progression. The biggest confusion starts after D.
| Cup step | Common Canada/US label | Common UK label |
|---|---|---|
| 4 | D | D |
| 5 | DD/E | DD |
| 6 | DDD/F | E |
| 7 | G | F |
| 8 | H | FF |
| 9 | I | G |
| 10 | J | GG |
| 11 | K | H |
Use conversion as a shopping guide when a Canadian product page shows imported sizing. Band labels are often straightforward between Canada and the US, but cup letters can change with UK and EU systems.
| Canada example | US | UK | EU | France | AU/NZ | Japan | Italy |
|---|---|---|---|---|---|---|---|
| 32C | 32C | 32C | 70C | 85C | 10C | 70C | 2C |
| 34D | 34D | 34D | 75D | 90D | 12D | 75D | 3D |
| 36DD/E | 36DD/E | 36DD | 80E | 95E | 14DD | 80E | 4E |
| 34DDD/F | 34DDD/F | 34E | 75F | 90F | 12E | 75F | 3F |
These examples show how a Canadian starting size can change when the same shopper looks at US-style and UK-style labels.
A 31 inch underbust often starts near a 32 band. A 5 inch difference commonly points near 32DD/E in US-style Canadian labels, or around UK 32DD if the brand uses UK sizing.
A 34 band with a 6 inch difference may start near 34DDD/F in many US-style labels. If the retailer is using UK sizing, compare around UK 34E instead of assuming the same letter.
Try the sister size 32DD if the cups feel close but the band rides up. If the cups spill as well, move the cup volume rather than only changing the band.
Canada shoppers often move between department stores, local boutiques, US online retailers, UK full-bust brands, and European labels. The same product category can use different size systems depending on the brand, not only the store location.
If the chart shows DDD, it is likely US-style. If it shows E, F, FF, and G after DD, it may be UK-style. If it shows 70, 75, and 80 bands, start with EU conversion.
A Canadian retailer may explain measurements in centimetres while selling bras labeled 34D or 36DD. Measure in the unit you trust, then convert through the calculator.
Most Canadian sizing mistakes come from assuming every Canadian product page uses one system. Use measurements first, then check the brand's label sequence.
Many do, but not all. Canadian retailers can sell UK and EU brands without changing every product label into US-style sizing.
Measurement instructions may be metric, while the bra label is inch-based. Enter the unit you measured, then let the calculator estimate the label.
If a Canadian boutique carries UK full-bust brands, a UK E or F should not be treated as the same label in a US-style chart.
The band should sit level and firm on the loosest comfortable hook when the bra is new. Cups should not gap, wrinkle, or spill. The centre gore should sit close to the sternum when the bra style allows it, and straps should fine-tune lift rather than carrying most of the support.
Sister sizes keep similar cup volume while changing band tension. If 34C feels tight in the band, try 36B. If 34C feels loose, try 32D. For US-style Canadian labels, 34DDD/F, 36DD/E, and 32G are nearby volume relatives with different bands.
Canadian sizing gives you a starting language, but brands still draft bras differently. A moulded T-shirt bra, plunge, balconette, wireless bra, and sports bra can all feel different in the same label because cup depth, wire width, fabric recovery, and strap placement vary.
Methodology
The calculator estimates a starting size from underbust and bust measurements, then the guide explains how Canadian shoppers should check that estimate across local, US, UK, and European brands. It is fit guidance for bra shopping and does not replace personal fitting advice for pain, surgery recovery, injury, or medical concerns.
Often, yes. Many Canadian bra labels use US-style inch bands and cup labels. But Canadian retailers also sell UK, EU, and French brands, so always check the brand's size chart before assuming the label system.
Measure snugly under the bust for the band and around the fullest part of the bust for cup volume. Enter both measurements in the calculator above, then use the result as a starting point for fit checks.
Either works in the calculator. Inches are usually simplest for Canadian retail labels like 34D or 36DD, while centimetres can be useful if your measuring tape or retailer guide is metric.
UK brands often use D, DD, E, F, FF, G, and GG. Many US-style labels use DD/E, DDD/F, G, H, and I. The cup volume can be similar even when the letters are different.
Brands can vary in cup depth, wire width, fabric stretch, gore height, and style shape. Treat the calculator result as a starting size, then refine with fit signs.
