Note: -the shoes is marked by CN size, not US size, not EU size; -pls. read size chart carefully before purchasing to avoid inconvenience to you; Features: -functions: puncture proof, wear resistant, non-slip, air permeability, anti-piercing damage -application occasion: mining industry, steel industry, smelting industry, chemical industry, etc. Specification: -gender: men; -seasons: spring, summer, autumn, winter; -sole material: non-slip rubber; -lining material: cotton fabric; -upper material: highly breathable nylon fiber, cowhide; Steps to Choose Right Size: 1, pls. measure your foot length (heel to toe in cm); 2, pls. choose the size acc. to the following rules: CN size 39= foot length 23.6-24cm (9.29-9.45inch)= US size 6.5; CN size 40= foot length 24.1-24.5cm (9.49-9.65inch)= US size 7; CN size 41= foot length 24.6-25cm (9.69-9.84inch)= US size 7.5; CN size 42= foot length 25.1-25.5cm (9.88-10.04inch)= US size 8; CN size 43= foot length 25.6-26cm (10.08-10.24inch)= US size 9; CN size 44= foot length 26.1-26.5cm (10.28-10.43inch)= US size 9.5; CN size 45= foot length 26.6-27cm (10.47-10.63inch)= US size 10; 3, if your foot is wider or fatter than normal person, you should choose one size bigger than the normal size you choose acc. to the rule above. Size Selection Example: -your foot length=26.4cm (10.39inch), pls. choose CN size 44= US size 9.5; -if your foot is wider or fatter than normal person, you should choose CN size 45= US size 10;