The command to get size of snap is good, But it does not list the size of content snap nor describe it depends on some content snaps.
One more thing that could be a separate topic is the information provided by snapd while installing a snap for example: snap install acrordrdc
will take forever and just says Automatically connect eligible plugs and slots of snap "acrordrdc" while downloading content snaps which are required. It will be nice to have neat information of what is being done. I know about snap tasks <id> command but that again is a separate command which is slow and user need to keep calling it to track the progress of task. There is one more command snap watch <id> which was I guess made to achieve the solution for this issue but it also shows what the main command is doing. i,e Automatically connect eligible plugs and slots of snap "acrordrdc" in this case.