I wanted these hands to be large and 3 fingered. I drew out a basic design and figured out the lengths for each segment of finger. I had to factor in an extra 1/2" for each segment due to the joint system I had set up. With that in mind, these are the measurements for each segment;

Fingers: Bottom - 5" (x4) Middle - 4" (x4) Top - 2.5" (x4)

Thumb: Bottom - 4.5" (x2) Middle - 3.5 (x2)

Having cut my 2x4 into 1.5x1.5 size, I was then able to cut those portions out. Next comes cutting the slots for the joints. We rigged up the table saw with a .5" cut to run through the center of the wood as shown. This was cut 3/4" in. This is the female end. Each piece would need a male and a female end, so only one side was cut. (we had some variations in this process.

Then, with the drill press, use a 1" drill bit to make the male end. This should be drilled down .5" on both sides leaving a .5" round disc in the middle. Then, with the band saw, shape a rounded end on each side of the segment (except the top one).

Once the full finger is pieced together, they will need to be shaped further. On the band saw, cut the shape of the finger. This will allow the to swivel more and provide a more natural shape for each finger.