Hello. . . 1 year old chest circumference: 52 cm / height: 50 cm...,( 2 years old chest circumference: 54 cm / height: 56 cm. ) (3 years old chest circumference: 56 cm / height: 53 cm. . . ), ( 4 years old chest circumference: 58 cm / height: 59 cm. . . ), ( 5 years old chest circumference: 60 cm / height: 64 cm. . . ), ( 6 years old chest circumference: 62 cm / height: 67 cm. . . ), ( 7 years old chest circumference: 64 cm / height: 70 cm. . . ),( 8 years old chest circumference: 66 cm / height: 73 cm. . . ),(9 years old chest circumference: 68 cm / height: 76 cm. . . ) ( 10 years old chest circumference: 70 cm / height: 79 cm. . . ),( 11 years old chest circumference: 72 cm / height: 83 cm. . . ), (12 years old chest circumference: 74 cm / height: 87 cm. . . )