antlered bucks have spikes three inches minimum, up into whatever you fantasize a "big-boy" to be.
button bucks and spike bucks under 3" are legal.
does are legal the whole time!
there is an alternative methods season (15-25) later on that is a little bit tricky depending on the county you hunt, though for sure you cannot use centerfire rifles and shotguns (you can use centerfire pistols now), bows, muzzleloaders, maybe crossbows too.