it is more correct to compare with the height:
(Unit：CM)
120=4T-5T：length=48 bust=70 shoulder=31 sleeve=35, fits for: 110-120cm height / 4-5 Years Old

130=6T：length=50 bust=76 shoulder=32 sleeve=36, fits for: 120-130cm height / 6 Years Old

140=7T：length=52 bust=80 shoulder=34 sleeve=38, fits for: 130-135cm height / 7 Years Old

150=8T：length=54 bust=84 shoulder=36 sleeve=40, fits for: 135-140cm height / 8 Years Old

160=9T-10T：length=56 bust=88 shoulder=38 sleeve=42, fits for: 140-150cm height / 9-10 Years Old
Note:
1.There is 2-3% difference according to manual measurement.(1 inch = 2.54 cm)
2.All measurement in cm, please note 1cm=0.3937ch, 1 inch=2.540cm
3.Please check the figures carefully and order the right size, don’t completely depend on the ” age advice”. It’s just for reference.