Does Canada Post ship by weight or size?

Ugh, Canada Post shipping – don't even get me STARTED! Does it go by weight or size? It's like they're playing some kind of bizarre, frustrating puzzle game with your packages. It's not just weight, oh no, it's way more complicated than that. They use this "volumetric weight" thing, which, honestly, feels completely made up. I swear, I once sent my grandma a lightweight, king-sized crocheted blanket – you know, the fluffy kind? It cost a fortune! More than that heavy box of books I sent my brother a week later, even though the books weighed, like, ten times as much. Crazy, right?

Basically, they compare your package's actual weight to its calculated size-based weight – which is super annoying to figure out. They use some formula, I think, multiplying length times width times height, and then... something else. I never fully understood it, to be honest, I just know it's a nightmare. So yeah, a big, fluffy pillow? Could cost more than a small, dense box of metal. It's infuriating! I remember that blanket incident vividly. I almost cried. I mean, seriously, Grandma's blanket shouldn't cost more to ship than, say, a set of dumbbells. It's just... illogical. Maybe I'm missing something obvious, but it just seems so unfair sometimes. Anyone else feel my pain?