Mailbox view with different size font

I have a couple of newer mailboxes that after being added display everything in a smaller font than the other mailboxes. A tiny font. I can't find where I can adjust or change the font size of it (better yet know why it did that) since it's only one or two doing this, the rest are fine.

What am I missing here?

Thanks!

No thoughts on this?

Most of my mailboxes:


A sample of the new tiny text mailbox:

With focus on a particular mailbox summary pane, use View > Text to adjust the size up or down (screenshot A), and there are settings you can  tailor in the Settings - Fonts dialog (screenshot B) ...



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THANKS! That's exactly what I needed and simple enough once I know. I'm curious why it would do that on occasion when I create a new mailbox.

It happens from time to time for me too. But with old mailboxes. The text size just changes. Not so often it's annoying though and it's easy to fix.