RE: Sig Kougar Build
HeliTB, To get your dimensions, Go to your center page and measure in the distance for your ailerons. This should help you get the width of the PW blocks. (Center joint to the aileron end). Then measure the width of the aileron stock plus the cutout that you are to make in the wing. This should give you the length of the PW blocks.
Double check your parts, they may be part of another plywood piece such as the plywood doublers for the fuselage, or a former.