Pick out the best looking skewers and cut them into 120mm lengths. As each pentagon is built individually you’ll need (12x5=) 60 sticks.
Print out a page with a circle, the diameter (Do) can be calculated with the formula for the outscribed circle of a pentagon: Do=1.7L. For 120mm side length you need a 204mm diameter circle. Lay out the pentagon so that the circle inscribes it, mark the location of the corners on the circumference of the circle. Make another 2 pages like this.