Google images removed the ability to search with a custom size. I used this feature a lot, mostly to search for 8K images. So I made a thing that lets you search by your own sizes and with a few preset ones. I am hosting it on GitHub so here is the repository and the website. I hope you find this useful.
Also here's the page on the website that lets you search with your own size.
(Also sorry if my English was bad... I've never really been the best when it comes to explaining things)
Videos
There doesn't seem to be any way to save Google Image search preferences, even when logged in to Google, which is a bit strange. I would have thought this would be something that a lot of people would use.
Anyway, you could probably create a little piece of JavaScript and add to your toolbar as a bookmarklet to do this.
Something like this would work:
javascript:(function() {
var searchTerm = prompt("Enter search term:","");
searchTerm = escape(searchTerm);
var url = "http://www.google.com/search?q=" + searchTerm + "&tbm=isch&hl=en&cr=&safe=images&orq=dog&tbs=isz:lt,islt:vga&biw=1280&bih=";
window.location.href = url;
})();
Still yearning for this almost 10 years later, for my use, I would prefer to set default to results licensed creative commons.
In lieu of a bookmark, in Chrome I create a custom search engine under Preferences -> Search Engine -> Manage Search Engines or chrome://settings/searchEngines. I will have already done a search for the settings I want, e.g. for "dog" and Under Tools, "Creative Commons Licenses" or
https://www.google.com/search?q=dog&tbm=isch&hl=en&tbs=il:cl&authuser=0&sa=X&ved=0CAAQ1vwEahcKEwjQu_mp_ojwAhUAAAAAHQAAAAAQAg&biw=1233&bih=659
I add a search engine, giving it a title, and a short abbreviation I remember, and enter the url, but replace "dog" with "%s"
https://www.google.com/search?q=%s&tbm=isch&hl=en&tbs=il:cl&authuser=0&sa=X&ved=0CAAQ1vwEahcKEwjQu_mp_ojwAhUAAAAAHQAAAAAQAg&biw=1233&bih=659
Now, whenever I want to do this search I just type in the url bar "gcc" TAB then the search term I want to use. The only thing is, if I modify the search and in google's interface, it loses my selection for Creative Commons. It does make it quick to do searches for any site. You can do this as well in Firefox and maybe Safari.