This was my second attempt - having ordered Black Extra Wide Calf wellies found I'd overestimated my calf width Yippee!!
Had decided to replace with these Muck Boots but phoned Jileon first who were extremely helpful.
The boots are fantastic - really comfortable, warm and totally waterproof - no more soggy feet when tromping across muddy fields and woodlands with the dog.
I am vertically challenged (5ft 1") so height of these is just right and body of boot is neoprene so stretchy enough to fit 45cm calf.
Only reason for four stars is that on reflection I think I could have taken a size smaller. I'm size 5.5 shoe and was advised to go for size 6. It's pretty roomy so have to wear chunky socks! Interestingly when I've since looked on Muck Boots own site they advise that women should go a size down (they're unisex boots).
Overall though really pleased to have found boots that fit and service from Jileon helpful and very fast.