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. Pls measure foot length at first and then choose size correspondingly. The size number marked in shoe outsole is China size number, not European size. 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 Note : The cotton-added style is one size smaller, and the cotton sleeve is detachable! so I suggest choosing a size one size larger Tips Color difference might be caused by different monitors,lights and other factors.Please understand. Notice Usually,order comes without shoes box,only a pair of shoes.But if you need a box,please