# Clothing size and fit statistics 2026: our original data

Rendered Fits, published 13 November 2026. Source page: https://www.renderedfits.com/clothing-size-statistics-2026/

Each figure describes its own sample; do not combine figures from different studies.

## What AI shopping assistants receive

Source: AI sizing study 2026 (one product from each of 1,383 UK and US Shopify clothing stores, looked up in Shopify Catalog on 21 and 22 October 2026). https://www.renderedfits.com/ai-sizing-study-2026/ https://doi.org/10.5281/zenodo.24165873

1. **80%** of 1,383 UK and US Shopify clothing stores: the product we sampled reached AI shopping assistants with no size chart and no measurements.
2. **4%** of those stores (59 of 1,383): the sampled product carried a full size chart.
3. **13 of 14** letter-size answers ChatGPT gave were Medium when it had no readable size chart, in a small test of 2 October 2026.
4. **14 of 15** products where ChatGPT matched the brand's own size chart, when the chart was readable (same test).

## How fashion stores publish size charts

Source: Shopify Size Chart Report 2026 (829 Shopify fashion stores and 107,138 sized products, scanned 24 September 2026). https://www.renderedfits.com/size-chart-report-2026/ https://doi.org/10.5281/zenodo.24165866

5. **31.6%** of 829 Shopify fashion stores had a size chart that could be read as text on the page.
6. **27.1%** of those stores published their size chart as an image, and 27.7% had no size chart the scanner could find.
7. **20.3%** of 107,138 sized products said how they fit, such as "true to size" or "size up".
8. **10.3%** of sized products gave the model's size or height; 73.8% of stores never did on any sized product.
9. **23.3%** of stores labelled the same size in different ways across products, such as "S", "Small" and "SM".
10. **47.7%** of stores with a readable size chart gave measurements in one unit only (n = 262).

## What product descriptions say about size

Source: Sizing information by category (459 Shopify fashion stores and 74,111 sized products, read from public product feeds on 21 October 2026). https://www.renderedfits.com/virtual-try-on-for/#data https://doi.org/10.5281/zenodo.24165871

11. **70%** of sized product descriptions on the average store gave no measurement, no sizing advice and no model size (459 Shopify fashion stores).
12. **12%** of sized product descriptions gave a garment measurement, and 9.7% gave sizing advice.
13. **16%** of dress descriptions gave a garment measurement (27,216 dresses).
14. **3.3%** of shoe descriptions gave a measurement (2,083 shoes).

## What a UK size 12 measures

Source: UK size 12 measurements (size charts published by 27 UK fashion retailers, read 12 November 2026). https://www.renderedfits.com/uk-size-12-measurements/ https://doi.org/10.5281/zenodo.24165875

15. **92 to 97 cm** is the bust of a UK women's size 12 across 26 retailers that publish one figure per size; the middle value is 94 cm.
16. **74 to 80 cm** is the size 12 waist across the same retailers; the middle value is 76 cm.
17. **99 to 108 cm** is the size 12 hip measurement, a 9 cm spread, close to two sizes at most retailers; the middle value is 102 cm.
18. **Size 10 = size 12** Oliver Bonas publishes 92, 75 and 100 cm (bust, waist, hips) for a size 10; Marks & Spencer publishes the same figures for a size 12.

## Licence

Our own figures: CC BY 4.0, credit Rendered Fits with a link to the source page or DOI.