I've almost always gravitated to using slopers. These are a great value, but it does leave me wanting some more. I've put all 5 on my ~27 degree overhang wall. I suppose if I tried to set the easiest problem possible, it could be ~V3, but I think you're much more likely to end up with something V5 or harder (I would put the problem I made at ~V6).
As for the size, the dimensions have already been written. Though I wouldn't call them pinches, you might end up using your thumb often on them to still pinch them and gain some additional friction.