As a data point on sizing...
I am a Cadet M/L in almost all the standard gloves (Titleist, Footjoy, Mizuno, etc). I ordered the Cadet M/L from Red Rooster, and it fit cold... but once I wore it in.... and it relaxed... it was maybe 1/2 size big. Still wearable (and enjoyable) but I'm ordering the Cadet M on this order because I know it will "give" a little within the first swings on the range, and be ready for action by the first tee. Take that as you will 🙂