When we were young men , my baby brother & I would stack & throw 3 Frisbees® of different sizes inside each other; they’d separate midair (and yes, the other guy would usually catch all 3).
So, “golf discs” are the size of a smaller Frisbee®.
The name, BTW, came from Yale students throwing pans from the Frisbie Pie Co.; the name was adopted (with the anti-lawsuit spelling) by Whammo.
“(Harry Potter reference, anybody? They’re free(‘cause they’re ACTUALLY “worthless,” given which AWFUL author STILL “profits” from said references…)!!!!)”
Qué?