They work fine with my 666s-19L, that are 7,5" on the hem (size W30L32)
Jeans of the 555 family of same size are about 7,0" (that I can't wear because of my proportionally huge calves) and I think they are too much tapered for boots like these.
BUT, if someone wearing, say, a size around 33-34, maybe he can go on even with 555!