Size Chart: Size(cm) 70---Length:36---Bust:44---Age:0-3 Months 80---Length:38---Bust:46---Age:3-6 Months 90---Length:40---Bust:48---Age:6-9 Months 100--Length:42---Bust:50---Age:9-12 Months Size(inch) 70---Length:14.17---Bust:17.32---Age:0-3 Months 80---Length:14.96---Bust:18.11---Age:3-6 Months 90---Length:15.75---Bust:18.90---Age:6-9 Months 100--Length:16.54---Bust:19.69---Age:9-12 Months Friendly Tips: 1 inch = 2.54 cm Please allow 2-3% inch deviations for the manual measurement. If you baby is chubby, we recommend ordering a size up.