Men’s ski boots use the Mondopoint (or mondo) sizing system, which measures the length of your foot in centimeters. To find your size, stand with your heel against a wall, mark the tip of your longest toe, and measure the distance in centimeters. This measurement corresponds directly to your Mondopoint size. 

A proper fit should feel snug but not painfully tight, with your toes just touching the front when standing upright. When you bend your knees, your toes should pull back slightly. The heel and ankle should be secure to prevent movement and blisters. A precise fit enhances control and comfort on the slopes. 

Performance fit is recommended for advanced skiers, offering a tighter, more responsive feel for better control at higher speeds. Standard fit is slightly roomier and more comfortable, best for beginners or those who ski less frequently. Choose based on your skill level and skiing style. 

Not all ski boots fit every binding. Most alpine boots work with standard alpine bindings, but touring or hybrid boots may require specific bindings. Always check compatibility between your boots and bindings before purchasing or using them together.