The size is 29cm! I bought these boots to wear for snowmobiling, but I no longer have a snowmobiling job, so I'm selling them. They are originally snowboard boots, so if you're looking to start snowboarding this year but find the equipment expensive, I'm selling these at a low price. How about it? I've worn them about twice and they worked without any problems. I don't know much about this, so I may not be able to answer all your questions completely. Thank you.