Sprites not fitting in tilemap

I’m trying to figure out isometric tilemaps and downloaded some sprites from the asset store.

First, when i try to make an isometric tile palette, it does show as being the same as the grid in my scene.

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And then when I add a sprite to my palette and paint it into my scene, the sprites don’t take up the entire grid squares.


I have already tried changing the pixel per unit of the sprites to 1024 because they are 1024x1024 textures.

I’m new to unity as a whole so please excuse me if I used the wrong term for anything.