print 9 pcs to start with if your hand is bigger just add a piece
you better check support settings you need to allow to create support for areas equal or as small as 2-3 square milimeters to print joints properly
I recommend to choose one joint which will work as opening and smooth it out with a needle file so it it snaps easier. Also putting it on with bits installed is way easier.
created in fusion 360 as one of very first projects into parametric modeling