My head has a 23 1/2" circumference and it fits on me... barely. I think it would be perfect for some one with a 23" head. It is mild steel with a welded stainless aventail.

I've got a back-point Thornbird bascinet for sale. Padded, strapped, with a welded aventail. All ready to go, only been fought in twice. Still shiny. $600 firm.