4 inches 

Selenite is essential for cleansing our aura, as wands are a shape that directs energy flow. Especially if you are sensitive to other people’s emotional energy, or the energy of a space, using selenite wands to cleanse your aura will remove that low vibration energy from you.
Selenite is considered one of the more powerful healing stones. It ensures a peaceful environment when stones are placed around the home and is an excellent stone for meditation.