The first time I made those, I just had to eyeball the size to cut the acetate according to the size of my glass ball ornament. Kinda held it on a piece of scrap paper and traced a circle around the glass. Then cut it a little smaller than the traced image.
In order to get it to stay you have to cut a TAB at the top of the circle shape of acetate. You use the tab to hold onto the acetate as you are lowering it into the glass ball. Once you get the acetate squeezed into the ball the tab helps you straighten and align it.
Do you know how you roll the acetate up once you have finished your decorating? Then slide it into the glass ball?
Any more help needed, please ask.
Carol
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