Google seems to have removed a very useful search option from their search engine. Previously, users were able to search images by size, particularly those “larger than” a certain megapixel size. I found a workaround:
Add the following query to the end of your Google Image Search’s very long url
&tbs=isz:lt,islt:10mp
And you can replace the 10mp with the following size steps: 2mp, 4mp, 6mp, 8mp, 10mp, 15mp, 20mp, 40mp, 70mp.
I hope Google returns these feature as it was quite useful.