I am building an Android app that will place custom caricature illustration/watermarks on a photo backdrop. I need 20 different illustrations that a user will scroll through and make a selection. The illustrations will be cartoon-ish in nature and will need to look OK when zoomed/expanded on a 1280x960 photo backdrop. Sample illustrations will be provided later.
1. 20 illustrations of a similar theme - one of these will be both a logo and used as buttons.
2. High enough resolution so that when zoomed in on.
3. File sizes should range from 50KB to 120KB
4. Resolution I think should be at least 136x161 up to 400x348
5. Filetype PNG