It will vary. Approximate age (UK) for size 86-92 cm is 2 years old (24 months), for size 98-104 cm it's 3-4 years old, 104-110 cm is for 4-5 years old, 110-116 cm is for 5-6 years old, while 116-122 cm is for ages 6-7.
Here's a guide to children's clothing sizes:
The American, British and Australian sizes are based on the age of the child, while in Europe the size is based on the child's height in centimeters. Some US sizes include a "T", which stands for toddler.
When buying your little darling some clothes, don't just go for the tempting looks of the garment and consider his or her comfort and safety first. Check out these baby clothes buying tips shared by eBay.