Herkimer Diamonds have tremendous variation of size and special formations, from perfect faces and terminations, to quite battered and chipped. Grade B herkimers will fall somewhere in the middle. They'll have good form, with some flaws. Some may have chips, and they will likely have some visually interesting inclusions. Great for medicine pouches and many other uses.
This picture shows a representative sample of those items currently in stock. Clarity and shape varies.
Approximate size: .2"x.2"x.2" (.5cmx.5cmx.5cm)