These are the bonnets I mentioned on facebook.
This is more green than blue as it looks here. It would fit a child between 18 months and 3 years.
This has a brim that stands off the face, so it is pretty but may not offer my coverage. It would fit a child up to 2 or 3 years.
The same bonnet, in a pretty light blue floral fabric.
This is a standard sunbonnet, which I can make in any size and in any colour of light cotton fabric. The ones I prefer to make now have a neck ruffle to keep the back of your neck from getting burned. I have some pretty Ozark style bonnets to sew that are similar to this, but with fancier ruffles.
A slat bonnet has battens in the brim to give it some shape while still lying flat when it is off your head. It has a wide cape across the back and shoulders. It is the best protection from the sun, but it has rightly been described as feeling like you have your head in a mailbox.
Bonnets obscure the side vision, and while this is fine working in the yard or garden, it’s best to remove it when driving or crossing busy streets.