I always heard it as dina-sour in Jurassic Park, can’t shake that mental reference haha

That’s how merriam webster pronounces it! I’d pronounce it like that as well, got curious, so I googled

You can do the same with dimensions that fit together without gaps

I think it serves a purpose. In the Netherlands you don’t get plastic bags for free anywhere anymore, so everyone I know tends to have some with them to reuse, instead of amassing huge amounts at home in a bag-bag