I bought these for a costume but ended up not wearing them more than 30 minutes due to discomfort.  I have very large calves, so I knew these wouldn't zip up, but I thought that would be fine since I was going to modify them anyway.  However, I would note that the shaft on these seemed abnormally slim.  I think even most people with "normal" calves might have a hard time zipping these up.  That being said, I did my modifications and put them on, but they were still extremely uncomfortable.  I am a very standard size 9, but these seemed too small.  I don't think going up a size would help either.  It almost seemed like my foot was too *tall* - it felt like my foot was being smushed from the top of the boot, not really from the sides or front and back.  Luckily, these were cheap, so I'll just count it as a learning experience.  However, if you have "chunkier" feet or are anything less than dainty from the knee down, I wouldn't recommend these boots.