For Size Please choose size according to the foot length (from heel to toe )! Different country different material have different size standard . So our US size ,Europe size may have some different with yours. The size number marked in shoe outsole is China size number, not European size. Please note: When purchasing a size, please measure the length of the foot and choose the size according to the length of the foot. Friends with wide or fat feet are recommended to choose one size larger! If you don't know how to choose the size, please contact our online customer service. size35=foot length 22.5cm size36=foot length 23cm size37=foot length 23.5cm size38=foot length 24cm size39=foot length 24.5cm size40=foot length 25cm size41=foot length 25.5cm About chromatic aberration Due to the different contrast of personal monitors, there may be slight color difference between the picture and the actual product. About smell New shoes that have just left the factory may smell of glue, but it is not a quality problem. I hope it can be understood. The smell will dissipate after being placed in a ventilated place for a period of time.