I've only ever been using "regular" dash, a minus, for that. How do you even type yours? If I ever needed differently-sized dashes (and I don't know the difference between them) I always used wiki to copy them.
(disclaimer: I feel like this obsession with dashes is special to native English speakers, which I'm obviously not)
Depends on your OS. Mac is the easiest, it's just ---, Linux depends on your distro, if it uses KDE, it's <right-win>--- —. Windows is a little awkward, I think you need <right win>+the code point.
silly specific: the minus sign is a separate character. The dash equivalent is the en dash (–), versus the larger em (—) and smaller hyphen (-).
The en dash is also used in things like scores (3–2 Turkey), votes (the bill passed 58–42), or connecting words where the second part is longer than one word (the Australia–New Zealand alliance.) You can remember the latter as, "a hyphen isn't big and strong enough to hold on to more than one word.
If you're on a mac, pressing Option+- is the en dash and Option+Shift+- is the em dash.