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Definately a cutie, though with my big man hands would probably struggle to hold it, I was thinking that a std straight with a cut down blade would be good, but for ballance it might be better to...

Would guess about 35-40 mm based on it being about 1.75 thumb widths and my thumb being about 20 mm wide.
if a square toed razor is more likely to cut you, due to the "point" of the corner, unless...

While I realise that in theory the answer is as smaller fraction of a mm as you could make the blade, practically what is the shortest usable blade length.
The reason I ask is that straights seem to...