I love these . They not only keep you from burning your hands taking things out of the microwave, But they also help keep your ice cream cold.
This is the video I used to help me make these. The direction are super easy.
I made the size ten bowl. It works great with my soup bowls.
To made the other sizes here are the size darts that you will need
15 " x 15 " size bowl holders: I used 1 " across and 3 " down for the darts
12 " x 12 " size bowl holders: I used 1 " across and 2 1/2 " down for the darts
10 " x 10 " size bowl holders: I used 1 " across and 2 " down for the darts.