iOS Mail app signatures never match the type/font size of the body of the message

In Mail Settings I’ve added unique signatures to each mail account.

After sending an email I see the signature type/font size is larger than the body type size.

(IMO this is unprofessional.) I’d like to solve this.

example:

After a recent iOS update I can see the type sizes in Mail Settings—Signatures lines are difference sizes. How to control the type size in Mail Settings—Signatures?

example Signatures settings; Notice the second signature has two type sizes