ALTRYN Size Guide
At ALTRYN, we believe that performance is born from precision. Our sizing architecture is engineered to support the biomechanics of the human body, ensuring that every piece of gear—from our technical footwear to our compression apparel—functions as a seamless extension of the athlete. We do not just design for size; we design for movement. Whether you are navigating rugged trail terrain or pushing limits in high-intensity training, our precise sizing ensures optimal stability, breathability, and ergonomic fit. Our commitment to accuracy allows athletes to focus entirely on their performance, knowing their equipment is perfectly calibrated to their unique physical profile.
How to Measure
To ensure the most accurate fit and to maximise the performance of your ALTRYN gear, please follow these professional measurement instructions. We recommend measuring your feet at the end of the day when they are at their maximum volume.
- Place a clean sheet of paper on a hard, level floor against a vertical wall.
- Stand on the paper with your heel positioned firmly against the wall.
- Ensure your weight is distributed evenly across both feet.
- Using a fine-tip pen, mark the furthest point of your longest toe and the outermost edge of your heel.
- Carefully remove your foot and measure the distance between the two markings in centimetres.
- For footwear, we recommend adding 0.5 cm to your measurement to allow for natural foot swelling during activity.
- If you find yourself between two sizes, we suggest selecting the larger size to accommodate movement and thermal regulation.
Footwear Size Charts
Our footwear is designed with a focus on anatomical precision. Use the following charts to cross-reference your foot length with international sizing standards.
| UK | US Men's | US Women's | EU | Foot Length (cm) |
|---|---|---|---|---|
| 3 | 4 | 5 | 37 | 22 |
| 7 | 8 | 10 | 41 | 26 |
| 9 | 10 | 12 | 44 | 28 |
| 11 | 12 | 14 | 46.5 | 30 |
| 15 | 16 | 18 | 51.5 | 34 |
| UK | US Men's | US Women's | EU | Foot Length (cm) |
|---|---|---|---|---|
| 2 | 4 | 4 | 34.5 | 20.5 |
| 4 | 6 | 6 | 37 | 22.5 |
| 6 | 8 | 8 | 39 | 24.5 |
| 8 | 10 | 10 | 42 | 26.5 | ．
| 10 | 12 | 12 | 44.5 | 28.5 |
Apparel Size Charts
Our apparel is engineered for compression, mobility, and moisture management. Please refer to the measurements below to find your ideal performance fit.
| Size Label | UK | US | EU | Chest (in) | Waist (in) | Hips (in) |
|---|---|---|---|---|---|---|
| Small | — | — | 46 | 36–38 | 35–37 | 35–37 |
| Medium | — | — | 48 | 39–41 | 38–40 | 38–4
Sizing InformationGeneral FitALTRYN sizing tends to follow standard UK sizing. However, we recommend checking the specific size chart for each item. Fit Recommendations
Important: This page provides essential and expertly curated size conversion information that should be used in conjunction with the complete interactive tools available at sizechart.uk. For the most accurate size conversions and access to our comprehensive database of brand-specific charts, measurement guides, and real-time conversion tools, please visit the full website. The information presented here represents only a portion of our complete sizing resources and should be evaluated within the context of your specific sizing needs and the brands you're shopping for. It is impossible to determine the anatomical size of a shoe or clothing item without the use of a measuring tape or ruler in conjunction with the size chart. |