Age: 4 5 6 7 8 9 10 11 12 Years Old

it is more correct to compare with the height:
(Unit：CM)
110=：Tops length=27 bust=71 Pants length=23 waist=51, fits for: 100-110cm height / 4 Years Old

120=：Tops length=29 bust=74 Pants length=25 waist=54, fits for: 110-120cm height / 5 Years Old

130=：Tops length=30 bust=78 Pants length=26 waist=57, fits for: 120-130cm height / 6 Years Old

140=：Tops length=32 bust=82 Pants length=28 waist=60, fits for: 130-140cm height / 7-8 Years Old

150=：Tops length=33 bust=86 Pants length=29 waist=63, fits for: 140-150cm height / 9-10 Years Old

160=：Tops length=35 bust=90 Pants length=31 waist=66, fits for: 150-160cm height / 11-12 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.