This is our size chart for your reference: Inch
Size Measurement:
UK/EU Size:7/8Year:-----Chest 35.4", Sleeve 20.1",Length:23.4"
UK/EU Size:9/10Years:----Chest 42.5", Sleeve 20.1",Length:23.6"
UK/EU Size:11/12Years:-----Chest 38.6", Sleeve 20.1",Length:23.6