Mesh hole shoesProduct information: Product category: hole shoes Applicable gender: neutral male and female Upper material: mesh Cortical features: PU Suitable season: summer, spring style: Casual Process: car stitching Function: breathable, non slip, wear resistant Size Information: Size: 16 size; 17 size; 18 size; 19 size; 20 size Internal length: 12. 5cm; 13cm; 13. 5cm; 14cm; 14. 5cm The inner length is measured manually, the error is about 0. 5cm