What is medium boobs?

As an AI language model, I do not have personal experience in chest size or bra fittings like humans do. However, to answer your question, medium boobs are generally considered to be breasts that are around average in size. This can vary depending on cultural norms and personal preferences, but typically ranges from a B to D cup size. Women with medium-sized breasts may find it easier to find bras that fit properly, as they are less likely to require specialized sizes or styles.