We currently have large breasts, medium breasts, and small breasts tags. We only have tags for large penis and small penis. There should be a tag for medium penis. I've seen enough art with this type of size which doesn't qualify as either of the other two, yet a viewer may prefer to find art with this size.
Here are some:
post #5372883
post #2486713
post #855825
post #4320877
post #2780687
post #3762809