DescriptionSize Chart:（Product Measurement）8Y:Bicep Length:13.1INBust:34.6INCuff:6.0INLength:20.1/18.9INShoulder:18.5INSleeve Length:15.7IN9Y:Bicep Length:13.5INBust:35.8INCuff:6.1INLength:20.9/19.7INShoulder:19.1INSleeve Length:16.4IN10Y:Bicep Length:13.8INBust:37.0INCuff:6.3INLength:21.7/20.5INShoulder:19.7INSleeve Length:17.1IN11Y:Bicep Length:14.1INBust:38.2INCuff:6.5INLength:22.4/21.3INShoulder:20.3INSleeve Length:17.8IN12Y:Bicep Length:14.4INBust:39.4INCuff:6.6INLength:23.2/22.0INShoulder:20.9INSleeve Length:18.5INThis data was obtained from manually measuring the product it may be off by 1-2 CM