The file 'Target 4 Cardboard 35mm 3D Printer Model' is (stl) file type, size is 3.7KB.
This object was made in Tinkercad. Edit it online https://www.tinkercad.com/things/61sMji4QKsY
It is pretty sure 35mm . Good size over all at getting better. Great for drills, distance etc.
Print off a few and bring it to the range. Goes into cardboard and sticks in place as it is barbed. Use a brittle cheap PLA they will chip and shatter. Print off different colors etc.
61sMji4QKsY.stl | 18.7KB |