Taper jigs don't get much more basic than this hold-down taper jig. Build the plywood base and hardwood holddowns. Then, mark the angled cutline(s) on your workpiece. Position the rip fence so the inside edge of the jig base is against the fence and the outside edge of the base is flush with the blade. Align the marked cutline on the workpiece with the outside edge of the jig next to the blade. Secure in place, and make the cut as shown in the photo.
To simplify matters, we've added a Buying Guide for the hardware used on the jig.
The base measures aproximately 22"x6".