ALTRYN

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.

1. Place a clean sheet of paper on a hard, level floor against a vertical wall.
2. Stand on the paper with your heel positioned firmly against the wall.
3. Ensure your weight is distributed evenly across both feet.
4. Using a fine-tip pen, mark the furthest point of your longest toe and the outermost edge of your heel.
5. Carefully remove your foot and measure the distance between the two markings in centimetres.
6. For footwear, we recommend adding 0.5 cm to your measurement to allow for natural foot swelling during activity.
7. 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.

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.