I have a Tilemap with a hex grid, and a tile which is a 200x200px white circle. The circle does not take the entire resolution of the image because I want it to (otherwise tiles would overlap and I don't want that).
However, when I put it onto the Tileset, the tile region takes up the non-transparent contents of the image, like so:

I want the orange hexagon to fit in with the size of the image, not the contents, like in the red hexagon:

Can I do this? How?