I sewed Rhinestones on a winter hat When I wear it, the design looks different because it stretches I no like! Now I am purchasing tiny round silver rhinestones as a space filler. https://www.amazon.com/gp/product/B07QJ1ZR45/ How do I stretch hat while I sew rhinestones onto it. I checked amazon for head mannequins but 1. They are not cheap 2. They look scary! What is an inexpensive, non-scary way to stretch my hat while I sew my designs?