Demonia Riot-30 I believe, 30 eye holes not made anymore these are Knee high 51cm!  Laces included (There is no zip)
Measuring from your foot upwards its 48cm, do check in case it goes above Knee, best if its below.

These could do with some oil, Dr martens dubbin just to get them looking good, from the looks of it these are Vegan boots and not real leather.
Excellent sole and hardly used, Tongue has some of the black coating coming away but is hidden when done up.

Although  size UK 12, inside sole length is 285mm so running a size down, so best fit 11 and might fit 11.5

(Dr Marten boots run in these sizes)
UK 11 280-285 Made in England (Slightly smaller size and narrower fit)
UK 11 285-290 Overseas like Made in China, Thailand (Slightly Larger size, wider fit)