Renzo is 4, 112cm tall and wears size 4-5Y
Archie is 8, 130cm tall and wears size 8-9Y

Garment measurements by size (approx):
Size (cm) 2-3Y 4-5Y 6-7Y 8-9Y
Length 49 60 72 78
Front Waist 23.5 24.8 26.8 28