it is US size

Brand Name: ARSUXEO
Outerwear Type: Jackets
Sport Type: Cycling
Gender: Men
Fit: Fits true to size, take your normal size
Feature: Breathable,Anti-Pilling,Thermal,Anti-Shrink,Anti-sweat,Pockets,Anti-Wrinkle,Windproof,Reflective,Waterproof
Material: Polyester,Spandex
Model Number: S M L XL XXL
Collar: Mandarin Collar
Fabric Type: Jersey

Product features
Reflective brand logo and stripe keep you safe in darkness
Zipper pocket on  front and back for safe storage,
Three pocket on back for storage
Front part is Windproof  waterproof ,inside of the jacket warm up fleece fabric keep you warm all the time
Breathable keep you comfortable during sports(black part are for breathable and elastic,so it is  not windproof and waterproof)