The patterns are linked as PDF files so that you can print each out on a standard letter-size paper in the correct size. My hands are average size, so you can adjust yours as necessary.
Cut out two of each piece in 1/8" neoprene, single or double-sided nylon.
I've also used 1/16" double nylon, but I don't expect it to last too
Use neoprene cement on each of the edges, applying one or two coats (depending on how thick your cement is) and let it tack off for several minutes. Don't glue the short sections where the paddle shaft or your hand goes through. I do just one section of the time: First the top, then each of the sides.
A trick I've found is to lay one piece on the other (nylon together) with the edges lined up, then squeeze short sections of the pieces together at about 1" intervals, rolling the glued edges together. Once they are "tacked" in several places, press the entire length together. Then turn the assemby inside-out and make sure that you have a good bond all along the seam. I haven't found it neccessary to tape the seams.
*Note. My latest method is to glue the bottom pieces with nylon-out on one side, nylon-in on the other. This effectively doubles the life of the pogie if you like to have at least some of the fabric on the inside to make it easier to get the pogie on or off.
Both of the patterns are quite generous. The finished Pogiewill probably come further up your wrist than necessary. You can trim them back to fit. I usually leave "tabs" on the top and bottom of the top-hand Pogie so that I can finish pulling them on with my teeth.
Putting 'em on...
The neoprene stretches quite nicely over the T grip. Once they are both on the paddle, I put my hand in the lower pogie, then use my teeth to pull the upper pogie over my hand.