Baby BanzSunglasses Infant Sun Protection – Ages 0-2 Years – The Best Sunglasses for Babies & Toddlers, Baby

How big is his head? Do you know the measurement? My 2 month old has a 17 inch head and I'm worried these will be way too big.

Are these lenses polarized?

Do they provide 100% uva and uvb protection?

What is the difference between "baby" size and "0-2" size?