Thank you!
Flemming, i measure it when i get home from work, but it is quite long.
https://youtu.be/De_1aik20qc
Here is a short vid about it.
In Finland we use these orange plastic tubes to mark roads so when snow is being removed the tractor wont go to grass next from the road. They are 2-2,5cm thick and thats how my wide my target is. When i'm out i use them as a target and with this whip i can hit them quite often.