Sadly I've lost track of some of my blue hostas. I know that each of these is either Halcyon, Canadian Blue of Blue Dimples. I think that A and B are probably the same (B gets more light than A) and that they're Halcyon. I think C may be Canadian Blue. What do you think? Sorry I don't have a real scale or images of the underside of the leaves, but it's raining right now...