Size charts for lingerie and swimwear stores on Shopify
Bras, underwear and swimwear are sized by the body. Show band and cup sizes with clear steps for measuring the underbust, bust and hips.
Lingerie and swimwear are worn close to the body, so a size that's slightly off is felt straight away. Bras add a second dimension: a band size and a cup size, worked out from two different measurements, with cup letters that are named differently from country to country.
Shoppers usually measure themselves before buying these products, so clear, step-by-step measuring instructions matter as much as the numbers in the table.
What your size chart needs
Band and cup sizes
Bras are sized by band (the underbust) and cup (the difference between bust and underbust). Show both, and say which country's sizing you use.
Step-by-step measuring
Shoppers measure themselves for these products, so clear steps for the underbust, bust, waist and hips matter more than for most clothing.
Separate sizes for tops and bottoms
Bikini tops and bottoms are often sold in separate sizes. Give each its own chart.
What to measure, product by product
The measurements in each of our free templates for lingerie and swimwear stores. Use them as a starting point, then replace the numbers with measurements from your own products.
Example: Women's Bra Size Chart
Open this template →Typical measurements from the template, in inches. Every brand fits differently, so measure your own products before you publish.
| Band Size | Band Length (in) | Cup Width (in) | Cup Height (in) | Strap Length (in) |
|---|---|---|---|---|
| 30 | 12.5 | 5 | 4.5 | 12.5 |
| 32 | 13.5 | 5.3 | 4.7 | 12.5 |
| 34 | 14.5 | 5.6 | 4.9 | 13 |
| 36 | 15.5 | 5.9 | 5.1 | 13 |
| 38 | 16.5 | 6.2 | 5.3 | 13.5 |
| 40 | 17.5 | 6.5 | 5.5 | 13.5 |
Measurements that matter
The number in a bra size, such as the 34 in 34C, based on the measurement around the ribcage under the bust.
The letter in a bra size, such as the C in 34C, based on the difference between the bust and underbust measurements.
The fullest part of the chest, used for sizing women's tops, dresses and bras.
The widest part of the hips and seat, measured around the body or across the garment.
The distance from the crotch seam to the top of the waistband, which decides where pants sit on the body.
Measurements of the person a size is meant for, such as chest, waist and hip circumference.
Common mistakes to avoid
Numbers without measuring steps
"34B" means nothing to a shopper who doesn't know their underbust and bust. Explain where to put the tape for each measurement.
Not saying which country's sizing
Cup letters after D differ between the US, UK and Europe, and European band sizes are in centimetres. Say which system the chart uses, or show several.
One chart for tops and bottoms
Bikini tops and bottoms are often sold in separate sizes. Combining them in one chart makes both harder to read.
Ignoring stretch
Swimwear and shapewear fabrics stretch by design. Tell shoppers whether to size down for a firmer fit or stay with their usual size.
Checklist before you publish
- Band and cup sizes, with the country's sizing system named
- Steps for measuring the underbust, bust, waist and hips
- Advice to measure without a padded bra, with the tape level and snug
- Separate charts for tops and bottoms when they're sold separately
- A fit note on stretch and what to do between sizes
Free templates to start from
All size chart templates →
Set it up in Jotly
- 1
Create a chart from a template
Open Jotly in your Shopify admin, click Create Chart and pick a template, or start from scratch.
How to → - 2
Put in your own measurements
Edit the table, or import one from Excel, and choose the unit you measured in. Shoppers can switch between cm and inches.
How to → - 3
Assign it to your products
Assign the chart to products or collections on the Free plan, or to tags and vendors on the Global plan and above.
How to → - 4
Turn it on in your theme
Enable the Jotly app embed from the Settings page, then choose where the size chart button appears on your product pages.
How to →
How Jotly helps
Size chart and how to measure, in tabs
Keep the size table and the measuring steps in separate tabs so neither gets crowded. Tabs are included in the Essentials plan.
Learn more →More than one chart on a product
For sets, show a top chart and a bottom chart on the same product page. Available on the Enterprise plan, turned on by our support team on request.
Learn more →Reusable measuring guide
Write your how-to-measure steps once and reuse them in every chart. Reusable blocks are included in the Global plan and above.
Learn more →Common questions
Are US and UK bra sizes the same?
Band sizes match, but cup letters after D are named differently in the US and UK. Say which system your chart uses.
Should swimwear use the same chart as lingerie?
Often not. Swimwear fits differently, and bikini tops and bottoms may be sized separately, so a dedicated swimwear chart is clearer.
How do you measure band size?
Wrap the tape snugly around the ribcage directly under the bust, keeping it level all the way round. That underbust measurement is the basis of the band size.
How is cup size worked out?
From the difference between the bust measurement (around the fullest part) and the underbust. In US and UK sizing, each inch of difference is roughly one cup size; in European sizing, each cup step is about 2 cm.
What are sister sizes?
Sizes with roughly the same cup volume on a different band. Going down one band size and up one cup, for example from 34C to 32D, keeps a similar cup. Mentioning sister sizes helps shoppers whose usual size is out of stock.
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