What are plainer calves?

"Plainer calves" is not a common or recognized term in any field, including anatomy, fashion, or animal husbandry. It's likely a misunderstanding or a term specific to a particular context.

To help me understand what you mean, could you please provide more information?

For example:

* Where did you encounter this term? Was it in a book, article, conversation, or somewhere else?

* What was the context? What were you reading or discussing when you came across this phrase?

* Can you describe what you think it means?

With more information, I can help you understand what "plainer calves" might refer to.