If you don't know what this is used for, don't buy it! Diameter can be determined using a thread when flaccid and laying out on a ruler and calculating the resulting value diameter=yourValue/(2*Pi)*2, so a value of 11.5cm would be 11.5/(2*π)*2 = 3.66cm = 36-37mm diameter. You can use this link for calc: http://www.onlineconversion.com/circlesolve.htm
This model has a diameter of 33 mm and 7 mm spikes with 0.3mm top (Stings!), so it fits for 32-34 mm range. If you need other diameter, just text me, and I will provide a custom model. Have fun!
Padlock not included! You can order them here:
COM-FOUR® 4x Vorhängeschloss aus Messing, 20mm, mit 3 Schlüsseln
3/4" (20mm Appx) Mini Brass Lock 6-piece Set