Too big turned out too small

So the hat is finished. It just needs an i-cord and then its done. It’s pretty and purple. There is only one problem. It’s too small. It ends just across Me Made’s ears and that’s not  really suitable for a baby hat. I even picked the biggest size, 2-4 yrs, and it’s still too small. I should have swatched. One should always swatch but I would never have thought something this much bigger (1-3 yrs) would be too small. I will see if I can block it out (yeah right), otherwise I will have to add a brim at the bottom. I’ll sit calmly in the boat till I’ve blocked it at least.

I really hope a block will fix it.