mine are right about 1/4 x 1/4 and 1/2" long, but that's for osage. If designed properly, they are tough as other styles IMO.. I could shorten mine to 1/3" long pretty easy and may do so. I just started a bow that's going to be 55#ish with 1/4 wide x 3/8 deep pin nocks and it's going to be 46-48in with a longer than 25in. draw. If you're really careful not to overstress the nocks during tillering, or just leave the tips thick until tillered you can run em really tiny, and with sinew reinforcing the tips you can have even less mass. If you feel like using sinew you could just wrap some sinew around a micro tip and hook the string on that. I'm considering that on my next bow. sooo light, soo fast
-although it's tough to beat those killer nocks of Shannon's. good luck, -nick