Metal Lux's Astro series is now available in a wide range of colours and sizes. They all have a metal framework (in chrome, or gold-plated) decorated with glass curls.
The one above is Ø220cm. Here is a white one that is Ø180cm:
Here's a clear Ø120cm one:
and a Ø115cm mauve one:
Other sizes are 80cm, 50cm and 40cm, and there are more colours, such as this black:
There is a complete family of light types (table, floor, ceiling, wall) and various shapes. Here is a pendant that is more of a hemisphere than a sphere:
All in all, a very useful collection!