8.5:1 gear reduction. Shaft diameters are measured at the collar.

3/4 Cello There isn’t a size designated by Wittner for 3/4 size cello. However, the head size of the 4/4-7/8 is very much within range for a 3/4 cello. The 1/2-1/4 would probably look a bit small.

Bass Gamba: The 1/4 size cello pegs have a shaft length of 64mm and a head width of 30mm, so can work with a bass gamba (check the requirements of your instrument). We can sell 6 pegs for this purpose, please indicate this in the comments on your order.