Fairtex Muay Thai Shorts Size Guide
Fairtex publishes two related size charts depending on cut. BS19xx and X-series shorts use the modern Muay Thai cut. BS17xx shorts use the older slim cut, which sits a touch slimmer through the hip. Measurements below are flat-garment dimensions in inches. Pick by approximate body waist; the elasticated waistband flexes for comfort.
BS19xx and X-series (modern cut)
| Size | Waistband width (in) | Approximate waist (in) | Side length (in) | Leg opening (in) |
|---|---|---|---|---|
| XS | 12 | 24 | 13 | 10.5 |
| S | 13 | 26 | 14 | 11 |
| M | 14 | 28 | 14.5 | 11.5 |
| L | 15 | 30 | 15 | 12 |
| XL | 16 | 32 | 15.5 | 12.5 |
| XXL | 17 | 34 | 16 | 13 |
| XXXL | 18 | 36 | 16.5 | 13.5 |
| XXXXL | 19 | 38 | 17 | 14 |
| XXXXXL | 20 | 40 | 17.5 | 14.5 |
BS17xx slim cut
| Size | Waistband width (in) | Approximate waist (in) | Side length (in) | Leg opening (in) |
|---|---|---|---|---|
| XS | 12 | 24 | 13 | 10.5 |
| S | 13 | 26 | 13.5 | 11.5 |
| M | 14 | 28 | 14 | 12 |
| L | 15 | 30 | 14.5 | 12.5 |
| XL | 16 | 32 | 15 | 13 |
| XXL | 17 | 34 | 15.5 | 13.5 |
| XXXL | 18 | 36 | 16 | 14 |
How to choose your size
- Waist — measure around your natural waistline and match the result to the "Approximate waist" column.
- Between sizes — size up for a roomier feel through the hips, especially for kicking and clinch.
- Cut difference — slim-cut BS17xx sits closer to the leg with shorter side length; modern BS19xx gives a touch more length and a slightly wider leg opening. Both work for traditional Muay Thai movement.
- Fit note — Thai-cut shorts run shorter and wider at the leg than gym shorts, by design. The wide leg gives full hip rotation.
Modern cut chart:

Slim cut chart (BS17xx):

Built for the next generation of fighters, the Fairtex BSK2101 Kids Eternal Flame Muay Thai Shorts give young Nak Muay the same Thailand-made build quality the pros wear.
Cut for kids on Fairtex's slim Muay Thai pattern, the shorts move with full kicks and clinch work without bunching. The satin shell holds its colour and the elastic waistband keeps them locked in place through hard pad rounds and sparring.
Main Features:
- Premium long-lasting satin holds shape and colour through repeated washes
- Kids-specific cut for full kicking freedom
- High side slit clears the leg for round kicks and teeps
- Soft elastic waistband sized for younger fighters
- Handmade in Thailand by Fairtex craftsmen
See more youth gear in the Fairtex Muay Thai Shorts collection or browse all Muay Thai Clothing.
Manufactured by: Fairtex
Product Type: Muay Thai Shorts
Gender: Kids
Material: Satin
Origin: Thailand
£4.99 FREE - Spend over £75 (*Mainland UK only) - Delivered within 3 working days - Estimated delivery date provided at checkout - Tracking number available once shipped
£9.99 - Delivered next working day - Estimated delivery date provided at checkout - Tracking number available once shipped - Subject to order cut off times. *Order before 12pm.
£23.99 - Delivered within 4 working days - Estimated delivery date provided at checkout - Tracking number available once shipped - Destinations include Northern Ireland, Scottish Highlands and Channel Islands.
from £20 - For orders over 100cm in length or 30kg in weight. - Oversized items are not eligible for free delivery - Total cost calculated at checkout. Please check dimensions and weight are suitable before completing your order to save any unexpected returns costs.
Easy Returns available on all UK mainland orders via our returns centre - Please complete the returns form in full and send your order back to us via your selected method. - Returns will be processed within 7-14 days of receipt - If your order is oversized please contact us to arrange an alternative returns method. For more information view our returns policy.
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