They’re cherry profile, and the K6 has north facing switches. That will cause interference. You can look up a video on that. It would technically have the correct sizes for the K6 and any other 65% keyboards out there.
this isn’t an answer I know that I’m 6 months away from question, just a tip for anyone trying to buy these atm.
yes these will work perfectly fine on keychrons. even on drop's "official" photos above, they are on north facing switches. Only the super thick caps with tall ribs on the underside or a stepped design would interfere with north facing switches. see the last pic on this topic to see what I mean. these caps wont have this problem.