3POMMES Boys size chart:

Size
Height (cm)
Chest (cm)
Waist (cm)
Hip (cm)
3
98
54
51
55
4
104
56
52
58
5
110
58
53
60
6
116
59
55
63
8
128
63
57
68
10
140
70
62
74
12
152
77
66
81