For a maplestory skill animation? Was curious. I know it'll probably have a load of variation, but if you divide it into buff/attack/ultimate animations the average/largest size values shouldn't vary too much within the individual categories... at least I think.
It's difficult trying to use the ones in Fiel's skill extractions, because those have a black background that adds phantom file data to the actual size. It's probably not a consistent error either considering the glows interact with the black at different magnitude for every skill.