Hey Ace1960, thanks for picking up the pack!
This pack isn't on a fixed grid — the assets are designed to be used individually rather than sliced from a sheet. Each piece comes as its own image with a transparent background, organized by category, so you can place, scale, and arrange them one by one however your scene needs.
So instead of trying to split the sheet into a grid, you'd want to grab each individual asset file directly and import them as separate sprites in your engine/editor. This actually gives you more freedom since you're not locked into a fixed tile size!
Let me know if you run into any issues setting them up, happy to help!