Help with Jodhpur boots

[Tikka]

Been looking for a pair of jodhpur boots for my son, he is almost 2 and really enjoys riding, and going to do a few pony club things this year, but not going to push it. But getting confused on sizes, just got him measured for a pair of shoes and he is a 5.5, what size boots should I get and where from

 

[saddle]

Have a look at these, one of the few to go down to a baby 6!!
http://www.dragonflysaddlery.co.uk/addto...&itemid=196

 

[Tikka]

thanks lucyglitters. Can anyone tell me what toddler/childern size 5 is in european