FIRST ..find the images you want to save, place them in your "pictures" file..maybe create folder on your desk top.
next go to this site...click on browse and then find the image you want from your folder and then....
Next press the "host it" button" and away you go.
Just so that you know it works..I changed my linux avatar to a "walking penny guy"....really cool ..BTW..I saved the URL to my desktop for easy access..lol final note...70 x 70 seems to be a good size for the avatar....JMO