Paper: 30 sheets sized 4.8 cm by 12 cm
Model: diameter of 13.5 cm
While the original version is folded from 1:2√2 rectangles, it's also possible to use other rectangles. Here, I used 2:5 rectangles. Using that dimension, you only need three squares to cut all the 30 required rectangles, which is also perfect for a 3-coloring.