These could be light pulls, equally well they work for fans and blinds too! Each one is handmade using a range of shades to create a colour gradient. The Gradient Light Pulls are all frosted to a matte finish which allows the colours* of the glass to 'glow'.
My standard light pulls are approximately 4cm high, I make each one individually so there is some variation, that's the joy of handmade! I have had a few requests for larger light pulls so I have started to make a larger version which is 5.5-6cm high and have some limited stock of smaller light pulls (3.5cm, except where noted) too. That's a Standard and an Ex Large in my hand in one of the images.
For all sizes the hole at the top is approximately 3.5mm in diameter with a larger diameter hole at the bottom to hide the knot in your pull cord.
* The two lighter colours in the violet gradient do appear differently under different lighting conditions. They have been shown in natural light but under fluorescent lighting they will appear more blue than purple.