PNG? SVG or something else? …or as many formats & sizes as possible?
Hey Jerom! IMHO, SVG is always ideal if it is possible, because then it scales to whatever size people need it in. However, there are some raster effects that just can't be recreated in SVG, so I think PNG is the next best option. I would recommend something like 256 x 256 300DPI maybe, what do you think?