I received my Heiji yesterday: 245 x 55.5 (and 260gr). I special ordered a tall one, and paid extra. Having used it last night, I can assure you that the profile worked quite nicely! Maybe the others are right, and 55+mm is overkill, but I love a tall heel!
Also, aside from the profile, whatever Heiji uses for final edge sharpening is super course and bites really well. As a guy that likes 1000 grit edges, it worked well.
PS: the tip came with the two little chips you MIGHT be able to see. They'll sharpen out soon, but it's always a bit of a bummer when the knife doesn't get to you in pristine condition.
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