Nod nod, that could work. Much easier than to visualise the space-time curvature around it.

How can they both be massive? They have to be massive compared to something for scale (like, a can of beans), otherwise they just come out as normal sized. I’m just not seeing it.

Exactly. The OP doesn’t do justice to metric system. The centi- and deci-anything are really to be avoided, the important ones are 3 orders of magnitude apart. So you learn ~5 prefixes and gain ability to interpret a vast range of values from microscopic to cosmic, across all measurable quantities. We should appreciate it for genius it is.