Hi there! androidwallpape is a curated wallpaper gallery created with Android devices in mind.
The images are not 'Android size', because there's not a single specific resolution anymore. I usually link to the highest resolution possible - often desktop-sized - so that you can use it with your Nexus 10 or even a PC. The collection is simply images that I think look great as backgrounds for an Android device and have no watermarks.
Note: I don't claim any copyright over anything posted here. I will add a source of the image and the original author whenever I can. If you see your image here and want it to be removed or have information about soruce/author of an image, please send me an email using the 'Ask a question' thingy and I'll get it sorted.