Terrain from sprite has polygon collider offset

I am trying to generate my own terrain in Asprite. When I import into Unity the polygon collider is floating above. There don’t appear to be any invisible pixels as when I look at the sprite in the sprite editor I can see the physics shape is just offset. Any idea why?

Pretty sure the default collider for a sprite is always set with a bit of leeway by Unity. If you want it to be tight you’ll probably have to manually edit the collider. Do believe you can access such in the sprite editor, but haven’t done it myself so not sure.