imagesize is the operator and here is how you do it…

• Go to Google Image Search Page (images.google.com)
• Type imagesize:1280x1024 filetype:jpg Nature (imagesize is the operator. 1280x1024 is the dimension and filetype is another operator to mention the image extension like JPG, BMP, etc and finally Nature is the name/theme of the images I am looking for)

You do love what you see, don’t you? I would suggest you to try with various descriptions especially like space, cars, design, etc you can even use this to find the movie posters e.g., Spider man, Harry potter, etc.