@Tarantula @LarryFisherman might get 16 gauge
I can't remember actual gauge sizes, I think I went into the 20's when I wired my recording studio I went heavier, but I was running the wires under some carpet to a set of huge ass monitors. I've played in many bars that had much less speakers to their in house PA. The one consideration I had was having the wires heavily insulated as we were moving heavy speakers and amps, drum kit, before and after gigs. Whenever I moved and rewired or hooked my TV and all that I just got what ever gauge of fresh wire I could.
Like I said, most people would not hear any difference between gauge sizes, especially if they were also gaming or browsing. However you have nothing to lose by going to a heavier gauge, just a matter of availability and cost.