How do they fasten or tighten?

The zip goes all the way to the top then they have a velcro attachment aswell

How does size match up I’m a 9 and some 9 nines have come to tight and then order a 10 in different brand which were to big

They fit very well,I'm a 10 and there were no issues.

Has anyone else got there feet soaking wet in these?. Just got rained on and not happy. Tightened the toe protectors to see if any difference 🤔

Yes boots are crap in rain my feet got soaked the other week and when I got home I took the boots and had to tip water out of them.

Are the uk 12 a propper fit

I found them very good---I am really a size 10 / 11 BUT with various old age problems like bunions and foot "spread" I go for larger sizes-and put in an insole. I think the second pair of these that I bought-I went for a 13 !!-----but these also fit very well-hope this helps-Bob (Dr.Bob)