I don't think the question is dumb at all. It is really hard to visualize relative sizes.
I just happen to own a 2 1/4 inch scallop circle punch (EK Success). And I am able to produce 1 1/2 inch and 2 inch circles. So, I figured I would link a photo for you so you can judge which has the look you like best. Unfortunately, I couldn't produce the in between size 1 3/4 inch easily. And of course the photo was taken without the benefit of daylight. Hope it all helps you anyway.
Here's the link to the photo:
P.S. I hope that link works anyway.... if not it should be the latest photo in my gallery.