[answerheck]

Lovely work, thank you for sharing

Probably a comment on my subconscious desire for familiarity/patterns, but the left side of the map instantly made me think of NW Europe: long skinny Norway dangling between the UK and Denmark (not correctly spaced, but sizes are reasonably correct!). A few other candidates at a stretch - maybe some Baltic states off to the east, for example - but after that it breaks down unfortunately.

Cool project sir