The most common attachment size will fit virtually all Violet Wand sets made in the UK and in Europe right back to the early 1920's. The shaft diameter of the metal base is 11mm. Many of the UK attachments are square at the base - but are the same size

The most common exceptions are Radiostat / Radiolux which are a tiny bit bigger and will NOT fit into the wand hand piece of most standard European sets. The shaft size is 12mm

If you are unsure of which you have - try wrapping a small strip of paper around the circumference of the base and measuring it - you can see the difference !

• Standard European = 36mm circumference - 11mm diameter
• Oversize = 39mm circumference - 12mm diameter