Features:

Material: Natural cow bone (Unbleached)
Standard size fit for most brand guitar.
Size: 
Total length: 28mm. 
Head diameter: 7.8mm.
Collar diameter: 5.3mm. 
Bottom diameter: 4.2mm
Shank length: 21.1mm. 
String slot: 2mm.
3° Taper

Package includes:
6x Guitar Bone Bridge Pin
1x Pin puller