Pete wrote:

I've got a rather big head (I know, I know) and I am delighted with my
special order size 8 Tilley outdoors hat (25 1/8"; 64.5 cm).

I am getting into WW open canoeing and when I did a course none of the
helmets on offer fit me and it was agony to have to wear an L/XL one.

Pete, my head also falls outside the scales of most helmet manufacturers,

I got lucky with the Grateful Heads "Dropzone" helmet. It allows for the
addition of a faceguard as well :-)

Even for my head it offers great all around protection:

http://wilko.webzone.ru/soc-04.jpg

--
Wilko van den Bergh wilko(a t)dse(d o t)nl
Eindhoven The Netherlands Europe
---Look at the possibilities, don't worry about the limitations.---
http://wilko.webzone.ru/