14G 12G 10G Clitoral Clitorial Clit Hood Bar VCH Vibrating VCH Stimulating Jewelry Vertical Stainless Steel Dangle Barbell VCH Ring

Diameter means bar length

Made from Stainless steel (stainless steel does not tarnish)
The capsule is unscrewed to insert batteries and then tightly screwed to begin vibrating. You can wear this piece without it vibrating by unscrewing the capsule a bit. Has a nice steady quiet vibration.
The capsule diameter is 9.5mm and the length is 21mm.
Comes with 2 common watch batteries.

Made by Piercers
FREQUENT Q & A
How do I know what size to buy?
Industry standards for a vch piercing are 14 gauge so I would pick that. For the length it can vary but the average is 3/8 to 1/2 inch (10mm - 12mm).
Even better if you have the bar you were pierced with. It's normal to be pierced with a bar a bit longer than you actually need so if you think you'd like to go a bit shorter then measure your bar and work it from that measurement. When you measure do not include the balls (or space the balls take up) in the length, measure only the bar.
Does it matter if what type of bar I use (straight or curved)?
No, neither has any adverse affect on your piercing.