Our Extra Long Scale strings have a winding length (distance from the outside of the ball to the silk/taper) of 38" long.

These will fit nearly all 35" scale basses (either top-load or thru-body bridges) and some longer. 

PLEASE NOTE: These will fit on a standard 4 string 34" scale bass with no problems. However, the full diameter of the E string will wrap around the tuning post. This is perfectly fine.