I've been googlified

For some obscure reason, my Google results page is displaying the fonts in peculiar sizes. See the attachment.

There’s no logic to this…the fonts have generally become much smaller. See how the third and seventh entries are the normal size while the remaining entries have all shrunk. The third entry hasn’t been visited, but the seventh one has. I’ve not adjusted the zoom level and there’s no reference in the page source to an external css file that might’ve become corrupted.

It’s a mystery!