Hi jonathan. Feel free to ask on Specific Use Questions forum of Roll20 (or ask for a Mod to move this thread) if you would like some help optimizing your maps for the underlying math that exists currently there. It can be as easy as drag-and-drop-and-stretch without touching the math in many cases. Community members of the forum can help determine the size to make your map if you're not sure, til you get in the swing of it. The current Unit (square) size is 70x70 pixels at 100% zoom (you'd want up to 140x140 pixels to be absolutely perfect even at 200% zoom, but honestly shoot for 70x70 pixels per square and you should be good). Hexes are, granted, a bit more complicated (for math reasons). There are forum threads that examine-explain the hex grid size in greater detail, we can help you find those if that would help your use-case. There is a specific size in pixels that closely matches. Here is good info on the Wiki about aligning maps (including a section about resizing them if needed), <a href="https://wiki.roll20.net/Aligning_Maps" rel="nofollow">https://wiki.roll20.net/Aligning_Maps</a> Roll20 Image Best Practices wiki docs, <a href="https://wiki.roll20.net/Image_Best_Practices_for_R" rel="nofollow">https://wiki.roll20.net/Image_Best_Practices_for_R</a>...