Theme: Tool icon sizing?

So in working on a theme extension for Aseprite, I did hit a snag in creating larger than normal tool icons. My sheet.png and .xml does have the icons reproportioned to 15x17, however I couldn’t find options to change tool background dimensions to fit the new sizes. They align on the top-left, but fall off on the bottom and right edges.

Hi @RhinoKneel, some stuff in the theme is not fully configurable yet, but we can adjust it. Contact me at with your theme and what you would like to achieve (if you can make a list of problems/stuff that you cannot configure, that would be great). I would love to fix this for v1.2.9.