They're pretty small--about an inch long--but they hold more than the description sounds like. I have fine hair, but it's thick, and I can clip back enough hair to keep it from flopping in my face, and because they're so small they don't disrupt curls. What I usually do is take a piece of hair at the front and a bit underneath and pull that back and clip, so that it holds back the rest of the hair that wants to flop over, if that makes sense.
Former longhair, now CG, living in N. California where the fog meets the wind
3a/b, fine, normal porosity/elasticity, high density
Conditioner wash and style, sometimes with a dab of BRHG.