You are welcome. Traditionally it is made from clothing, but they are becoming really heavy. People in my country buy temari as Christmas decorations and I need to make them as light as possible , and in this case styrofoam ball is the best solution.
No, itis required to keep the base solid, the polyester threads will slide off the ball, and still you need about a half an inch of yarn and threads to be able to keep all the knots inside and have a layer of enough fine threads for them not to show the base threads
Could you make the same kind using foam first then fabric? (əvvəl köpükdən sonra parça ilə eynisini edə bilərsinizmi?) (Mozhno li sdelat' to zhe samoye snachala iz penoplasta, a potom iz tkani?)
Sock or lsce wool yarn for the inner layer, 40-50 sewing thread for the outer layer. And if you need to do a hidden markup, use the 20 thread of the same color. I will show some patterns that require that hidden markup