Thankfully there are only a few common electrode sizes but there are some less common sizes as well. The end cap ( the bit which plugs into the hand piece can be of the following sizes;

1. Karl Haider - 10mm Diameter. The smallest and very uncommon.
2. Standard European - 11mm Diameter. 95% of the violet wands we sell on this web site are of this type .............
3. UK soft square ended - 11.00mm. The same as The "Standard European"
4. UK/USA - Either Round ended or sharp square ended caps - 11.15mm (7/16ths of an inch)
5. Modern Chinese solid state devices. The glass is often quite thick and harder for the power to get through. The end caps are mostly 11.25mm
6. Oversize - 12mm Diameter. Very popular but with a smaller number of makes. Most notable are Radiostat/Radiolux, Vio and Ideal - which we occasionally sell.
7. Ukraine - 13mm end caps with thin glass electrodes for use with very low powered devices. A high powered Violet Wand device may break the glass over time.

If you are unsure of which you have try measuring with a set of calipers - the results may vary a little and if you are in doubt then contact us. You can also make an approximate measure using a flexible tape measure or piece of paper around the circumference which you then measure the length of on a ruler.

For instance

• Standard European = 34.60 mm circumference - 11mm diameter
• UK and USA Imperial 7/16th" = 35.00 mm circumference - 11.15mm diameter

• Many Chinese Imports - 35.30 mm circumference - 11.25mm diameter
• European Oversize = 37.70 mm circumference - 12mm diameter