5/8?? Neither of mine are!
Slightly :OT , but about Wapienica blades sooo...
I just don't get that they're described as 5/8. I have two other straights, a Dovo Bismarck 5/8 and a TI 4/8. Both of my Wapienicas are exactly the same size from spine to edge as my TI, i.e. 4/8. And both are visibly smaller than the Dovo 5/8 (and I am measuring from inside of spine to edge of blade).
Don't get me wrong, I'm more than satisfied with the Polish blades, have had success in honing one so far, and gave a pretty good shave, so I'm a happy customer.
But no way are they 5/8. Unless both Dovo and TI operate with a different scale!