Dear Giles, dear Nick,
thank you both for the feedback, much appreciated, even more so as sizing advice can be so boring for those kind enough to provide it! As far as I can see (from the small icon with the nice collection exhibited on the grass), Nick's RWs are lace-ups, my usual size in these (Beckmann/GTs & Iron Rangers) is US 8,5 or US 9, the 522 last of the 2990s seems to be smaller, thus a 9,5D for me. So I guess Wescos in US 9D or 9,5D would fit me … As for the WOs, it must be either US9D or US9,5D. I see that some people here complain about the tight fit of the WOs, no idea if that's about the actual sizing or the low toe profile (or both) ...