Fitting Boots is a bit like getting gloves that fit well, or the ago old and 'Shoei' or 'Arai' head saga - even if they are sized the same they rarely fit in the same way...try lots on is my advice, I ended up with last years top model alpinestars - fit really well, extremely comfortable. But they aren't what I wanted, the Sidi just wasn't comfortable on one of my feet !!