It will fit a six month old baby, probably a petite 2 year old, but I will be listing some new auctions w/girls and toddler hats that will definitely fit a 2 year old, honestly you may want to check those out.
I have a 2 year STEP-granddaughter-lol I know it wouldn't fit her so I would recommend my other listings for a child that age, I'll be listing tonight. I'm glad you asked.