These socks contain merino wool. Moreover, they feature vented and cushioned zones for better comfort. Ideal to wear with all kinds of footwear including safety footwear.
Take a piece of paper and a pen or pencil
Stand with your heels against the wall
Stand upright, placing your weight on both feet
Get someone else to draw a line be the tip of your toe
Measure the length from the wall to the line
Add 3-5 mm to the measured length (important for toe space)
Compare the foot length with size chart