Hey @JosephK7, I know it's been years since your original post, but still wanted to inform you. Some time ago we updated the Free Up Disk Space menu with the ability to see how much disk space possible to be freed if snapshots will be deleted. As for knowing the size of a particular snapshot, due to their nature, we cannot estimate how much disk space one snapshot will free if removed. Snapshots are interconnected, so removing a snapshot that is in the middle of a chain may not free the disk space but even take more disk space (in some situations), as changes must be merged to other remaining snapshots. Hopefully it makes sense, and if you have any questions please feel free to ask.