Is 34 b a good bra size?

it depends on how old you are. for an adult. no. too small :|

answer

It depends on your weight if you have loads of weight and is that small that is small. I'm a size UK 4 and i fit into bar size 32B and sometimes some are too small. I'm a teenager

Answer:

It really is but it really does depend on your age. I'm a teenager and I'm size 36B and its kinda like in between small and big boobs