It's Asian size，please check the detail sizer on the size chart image.T-Shirt Material: PolyesterCoat Material: Cotton BlendShorts: DenimColor: As the picture showDepartment Name: Children GirlsItem: T-Shirt + Coat + ShortsStyle: Three Piece SetDesign: CasualT-Shirt Collar: O-NeckT-Shirt Sleeve: Short SleeveCoat Sleeve: Long SleeveShorts Pocket: Both Side and BackShorts Closure Type: Zipper FlyCoat Length: Short StyleColor Style: Natural ColorPattern: Solid and StripedOccasion: CasualNote:1. Hint for choosing proper size， use similar clothing to compare with the size.2. Choose larger sizes if your size are same as the flat measurement Size chart.Size: There are 5 sizes (90， 100， 110， 120， 130) available for the following listing. please allow 1-2cm differs due to manual measurement， thanks (All measurement in cm and please note 1cm=0.39inch)