yellow, blue, and red, about the size of a thumb nail and smaller. (religion.blogs.cnn.com)
While the pasta is cooking, drain the tofu, pat it dry, and cut it into rectangles roughly the size of your thumb (1/2 inch thick and 1 inch long). (101cookbooks.com)
Peel a chunk of ginger (roughly the size of a thumb) and grate the ginger over a bowl. (spiceandsprout.com)