Size Chart with years and height recommend:

Size 110 :for height: 39 inch-43 inch,waist 38-48cm/14.96-18.90inch, tail length 65.0cm/25.59inch,recommend 3-4 T.
Size 120 :for height: 43 inch-47 inch,waist 41-52cm/16.14-20.47inch, tail length 67.5cm/26.57inch,recommend 5-6 years
Size 130 :for height: 47 inch-51 inch,waist 43-54cm/16.93-21.26inch, tail length 71.5cm/28.15inch,recommend 7-8 years.
Size 140 :for height: 51 inch-55 inch,waist 46-58cm/18.11-22.83inch, tail length 75.5cm/29.53inch,recommend 9-10 years.
size 150 :for height: 55 inch-59 inch,waist 48-62cm/18.90-24.41inch, tail length 79.0cm/31.10inch,recommend 10-13 years.
NOTE:Manual measurement, please allow 1-2cm error.