Well... if one wants to choose font size for text in Swatch Info objects while making one — tough luck. We can only set the color chip size.

Since Preview is completely missing now (here’s the request about it: http://illustrator.uservoice.com/forums/333657/suggestions/49681244), it’s hard to evaluate if text would be large enough to accompany them.
Even if you change the font size after the Swatch Info is created — won’t do, each text line is a separate type objects, their leading won’t be adjusted, the card background rectangles won’t adapt!

One can think this font is based on the [Normal Paragraph Style], and we can tweak it (beforehand!) to set the font size...
But it’s only half-truth. While the font family and the font style indeed follow the style, the font size is always 10 points.

So, team, if you look how people in different tutorial videos have to dance around this stupid limitation, to guess the card size to fit the font size relatively, and then scale the whole object... I hope you will fill shame at least.

If you are afraid to overload new users with controls in the dialog — at least make an option to scale font size to fit color chip size... or make it a relative value even.