Product name: Trend protective shoes Material: Flyknit upper Lining: BK mesh Toe cap: European standard EN steel head Insole: Polyurethane Soft Foam Upper style: mid-top Upper height: high top Toe style: round head Sole material: rubber sole Upper material: fly woven upper Shoemaking process: cold bonding process Baotou material: plastic toe Closure: Front tie Function: Anti-smashing / Anti-puncture / Wear-resistant / Light / Anti-slip / Breathable Scope of use: construction, oil field, woodland, factory, mountain climbing, agriculture, etc. size: 37 yards: Foot length: 23.5cm 38 yards: Foot length: 24cm 39 yards: Foot length: 24.5cm 40 yards: Foot length: 25cm 41 yards: Foot length: 25.5cm 42 yards: Foot length: 26cm 43 yards: Foot length: 26.5cm 44 yards: Foot length: 27cm 45 yards: Foot length: 27.5cm 46 yards: Foot length: 28cm 47 yards: Foot length: 28.5cm 48 yards: Foot length: 29cm Notice: 1. The size is manual measurement, there may be a 3-5mm error, which does not affect the wearing, please understand 2. If the big toe is everted, it is recommended to choose a size larger, the second toe is longer, it is recommended to choose a larger size, and the foot is wider and the instep is higher, it is recommended to choose a larger size. Thin feet are recommended to choose one size smaller. 3. Due to the influence of shooting equipment and light, as well as the difference in the resolution of the display, there may be slight color difference.