Beside the local chemist you could also have a look if you see some nice ones online.

I always like to look for these at the local chemist.

a family member bought one, not sure where from. go to a school supplies store. they might have small sizes or be able to order in your size

My local pharmacy always has great toddler hats for sun!!

Your local chemist should sell little hats that are sun safe too – maybe have a good look.

Cancer Council or camping/outdoors shops sell hats.

i usually buy ones from penny scallan. They are a little expensive but last for ages as they are great quality.