A sports bra size chart for brands should show underbust and bust measurements built from your approved sample, separate from the bottoms chart, because many customers wear one size on top and another on the bottom. Our sports bras and sets run XS to 2XL, sizes can be mixed within a style, and set tops and bottoms can be sized separately, so a first order can follow your customers rather than a fixed pairing.
Getting this right reduces returns, which matter more for bras than for most garments. Customers judge a bra on fit within seconds of putting it on.
What goes on a sports bra chart
Sports bras are sold in letter sizes, XS to 2XL, rather than band-and-cup sizes. The chart helps customers translate their body measurements into a letter.
| Measurement | Where | Why it matters |
|---|---|---|
| Underbust | Around the ribcage, directly under the bust | The main fit point; sets how the underband sits |
| Bust | Around the fullest part of the bust | Decides coverage and comfort in the cups |
| Underband width (garment) | Across the underband, relaxed, doubled | Lets you check the sample against the chart |
| Strap length | If adjustable, the range | Helps taller and shorter customers |
Most brands publish a body chart for bras (underbust and bust of the wearer), because customers know those numbers. Build that chart by trying the sample on people of known measurements, not by guessing from the flat garment. Keep garment measurements as your own reference for checking deliveries.
Style changes the fit
A low-cut, simple bra and a higher-neckline bra with a wider underband can fit differently at the same letter size. Pads change fit too. If you sell more than one bra style, give each its own chart, and check pads on the sample if you have chosen them.
Fabric changes the feel
Nylon-elastane and polyester-elastane both stretch in every direction and recover, but they feel slightly different on the body. Our guide to fabric for sports bras and matching gym sets explains the difference. If a style is offered in both, check fit in each.
Sizing a set: two charts, two sizes
For bra-and-legging sets and shorts sets, publish two charts: the bra chart above and a bottoms chart with waist, hip and inside leg. Then let customers choose a size for each piece.
How you sell the set shapes how you plan sizes:
- Packed together as one product: you choose the pairings in advance. Most sets pair matching letters, but plan some mixed pairs (for example S top with M bottoms) if your customers ask for them.
- Sold as separates that match: customers choose each size, and you hold stock of tops and bottoms independently. This is more flexible and usually reduces returns.
Either way, set tops and bottoms can be sized separately in our production, so the order can match whichever approach you choose.
Building the chart from your sample
- Ask for the sample in M.
- Try it on two or three people whose underbust and bust you know, at the edges of what you think M covers.
- Note where it feels right, snug or loose.
- Ask us for the graded garment measurements for XS to 2XL in that style.
- Wash the sample once and repeat the fit check.
- Write the body chart from what you observed, and keep the garment measurements for checking deliveries.
Rounded numbers and a short note, such as “if between sizes, choose the larger for a softer feel”, help customers more than precise figures they cannot measure at home.
Splitting a first order
The minimum is 100 pieces per style, with sizes mixed within it. A starting shape for 100 sports bras:
| Size | Pieces |
|---|---|
| XS | 10 |
| S | 24 |
| M | 30 |
| L | 20 |
| XL | 10 |
| 2XL | 6 |
For sets sold as separates, plan tops and bottoms on their own data. Bottoms often lean slightly larger than tops for the same customers, but your sales will tell you. How set pieces count towards the minimum is confirmed at quotation.
Adjust for your audience. A studio can collect sizes from members before ordering. A brand with a size-inclusive message should hold enough XL and 2XL not to sell out of them first.
Keeping sizes consistent
Keep the approved sample and your notes. Reorder the same style, fabric and pad option. On arrival, check a few pieces per size against your garment measurements. Track returns by size and reason; a cluster of “too tight under the band” in one size tells you where the chart needs a note.
Send us the style, fabric, colours and either a size split or a description of your customers, and tell us whether sets are packed together or sold as separates. See the full range on our white label sports bras and gym sets page. We confirm the size and colour split at quotation and make a sample for you to fit first.