I'd like to follow up the OP's question. I'm a newbie, so sorry if this is a silly question -- but how does it fit both 16px and 32px games? Do I need to resize them myself for that?
Sure! I'll try to help out. You dont have to resize it. :) When you have 16 px grid, 32 px is just 2 squares of 16 px tile. So you can still use 32 for 16.