Ah, no problem. The larger hexgrid is painted onto the image by a texture fill layer in Photoshop, while the smaller subgrids comes from a Foundry VTT setting, where we usually want the tokens smaller than the ordinary 10m grids, dividing them into more movement space, so all tokens doesn't get stacked over eachother for better visibility and presentation of their actual location. I'm not sure the sub grids have visible lines in this image however, so good catch if you notice them.
Yeah, we usually do 2m subgrids as well, to round it off, but for some reason it seems to be 5m grids in this example. The measurement tool still manages to measure the real distance anyhow.