There are 3 common spacing distances for slalom cones; 50cm, 80cm and 120cm.

It is usual for all three spacings to be setup for competition purposes, however you can arrange them any way you like for practice and play.

Normally a row of 20 cones are used for the 50 and 80cm spacings and a row of 14 for the 120cm spacings.

The simplest way to ensure your cones are evenly spaced is to use a builders tape measure and some “engineer’s chalk” (regular chalk is messy and always breaks apart). I have found this method is easiest if you pre-mark the positions on the tape measure in permanent marker, using a different coloured mark for each different spacing amount.