Okay, so I got the Kroops OTEs today, and they are *that* huge! Here's a pic:
Sure, I've got a smallish head, but these cover my whole forehead up to the hairline! Haha! They are light though!

I suppose if you wore some Bootsy Collins-type specs these might be appropriate!
So, I picked up the phone and gave Kroops a call; a fellow there said these were designed in the '70s to fit the eyeglass styles of the period! He also that many people with eyeglasses successfully use the standard cycling goggle over their specs, and that I could send mine back for a quick swap out, which I think I'll do. He added that even if there is a little goggle/frame contact, the soft lens plastic won't do any damage to the eyeglasses.
Good folks there at Kroops, it seems. I'll report back on the fit of the standard goggles once they arrive.