Czech glass - in sizes

Czechoslovakian glass from the 20-40’s come in various sizes. I have found certain shapes only come in one size and other shapes can come in seven sizes.
I think size is a great way to display pieces; especially in different decors.

1. Franz Welz 7 1/2” and 4 1/2”
2. Franz Welz frog vases 9” and 6”
3. Zipper unknown maker 8” and 6”
4. Franz Welz 10”, 8” and 6”