Okay, I've driven to Ljubljana and actually tried everything on. Since I started the thread, I thought I'd leave the results here if someone my size happens to ask the same question. Note that I couldn't try Reactive since they don't have it on hand, but I tried velocity 7mm which is supposed to be the same size.
Here are my measurements, to the best of my measuring ability:
Weight : 75kg
Height: 170cm
Chest: 95cm
Waist: 85cm
Hip: 97cm
Torso: 67cm (ish)
Inseam: 77cm (I think, kind of hard to tell where to start at the shoulder)
The suit size that fit the best was MLShort. ML was too big, I had clumps of free space under my arms. I had to use some effort to wave my arms around my head in MLShort, but that just how it is in the wetsuits, right? Any smaller size would be far too small.
Palm length: 18cm
Palm circumference: 20.5cm
The glove size that fit pretty much perfectly was L, I didn't even bother trying M and XL was too large.
Neck circumference: 39cm
Forhead circumference: 58.5cm
Size M fit just about right. I can't remeber if I tried S and it was comically small or if I tried L and it was comically large.
Foot length: 25cm
Now this one is very interesting. According to their chart, 25cm is EUR 39 and size 7. The boot that fit me was size 8, (EUR40-41, supposed foot length 26cm). And I usually wear EUR42 size shoes that is their 27cm size 9. So it seems that their boot sizes are a bit larger than one might expect. But yeah, size 8 fit nicely as far as width goes with only a small amount of free space in front of my big toe.
I'm looking to get a pair of JetFins to go with the Ultrawarmth 7mm boots. Does anyone have a simliar combination, preferably in size 8? What size of JetFin did you get? I've gone through
this thread and it seems like it should be either L or XL, but as usual, I'm right at the limit.