These baubles are made to decorate your windows, or possibly addition to your Christmas tree.
Colorful polka dots are individually decorated while bubbles are hot, then individually blown. There is a air hole in the bauble so make a strong hanging hock possible without a bubble is collapsing. Also, it allowed a generous thickness of glass so they are tough!
The sizes are varied from 5cm to 6cm, a air hole is about 3mm to 9mm (it all depends on the piece)