Glad I'm not the only one, I can get the 3/4 length boots but not the knee length ones. Also got another problem in that my instep is high, which makes the front of my foot higher than average, so have problems getting my foot into the foot part of boots before I even try to do them up.
I just hate buying shoes and have done so for so long. Blame my mum who made me weat 'sensible' shoes when I was a kid. OK, on most other girls but made my legs look like golf clubs as I had such skinny legs with huge 'sensible' shoes on.