This is free size ( size M)， Just have one size .Note : This product just have 3 color : blue ， black， sky blue. it is same with picture . Due to the difference between different monitors， the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the pictures， but not the same performance on different bodies as on the model. Size +/- 2 cm is normal .According to the color of the actual product， digital product photo will have some errors， It is normal .(All measurement in cm and please note 1cm=0.39inch) Thank you!