Measurements are as follows.

Sparkplug leads

#1 - 600mm Straight sparkplug / Straight distributor
#2 - 600mm Straight sparkplug / Straight distributor
#3 - 860mm Straight sparkplug / Straight distributor
#4 - 860mm Straight sparkplug / Straight distributor

Coil lead

Coil - 350mm Straight coil / Straight distributor

These HT leads need the screw on cap to be left on the Spark plug, 

and do not fit applications where the lead is fitted to the thread of the spark plug.