re: Three really large 18th century style chisels

It definitely does look like that, but they're pretty comfortable to use. if they were to be used as a push slick for houses, one could be made with a long handle, though. They're really intended to be struck - the edge is too wide to pare hardwood, but the handle is big enough to hold near the bottom (and tapered so the chisel doesn't need to be gripped too hard to keep it from dropping), and strike at the top with an inch or two of clear handle. worst thing you could have is a chisel with a handle so short that you accidentally allow the web of the thumb to get above the butt - it'll keep you wide awake for a long time if you strike the web of your hand. 

The guy who asked me to make one of these pointed to one in use at colonial williamsburg- it was either in PWW or finewoodworking. I told him I wasn't convinced that the pattern would be very useful, but if I was going to make one, I'd make two. I made two in 80crv2 steel, and thought it was a little lacking, and then just made two more - one for him and one for me. it takes a little while to make one like this - the size is large and I don't have a large power hammer and grinding is slow if you start from bar - W2 steel can go a few points harder and the difference between the two steels is pretty convincing. the guy who brought these up was right - they're useful. But not exactly the kind of thing you need to have in sets. 

Handle tip to bolster is 5 1/2 inches, made maybe to look shorter than that because the chisels are big.