Silk Caps are made by stretching out the cocoon over a cone form. They are about 25cm diameter and about 25 cm in length from the tip of the cap to the brim. A 3-D bowl shape can be created by opening up the brim and placing your hands inside, and stretching the sides.
They can also be separated into layers.
The weight of each silk cap varies, but average is around 15g.
Only one choice at the moment - Soot - but this will change before too long.