In reply to emily ward:
Hi Emily,
If you find that size small is right for your boots, it may be worth contacting the LD Mountain Centre in Newcastle (0191 232 3561) as I noticed three pairs of size small Yeti Gaiters in there over the Christmas holidays for £10 a pair !!
They were "brand new-old stock" and were downstairs in the "bargain" basement.
Cheers, Alan Mc