This is a barbed wire segment that gets duplicated along a curve. The curve is easily modified in edit mode.
The textures are all procedural so you don't have to worry about any blurriness in the texture and it is also very easy to modify.
The amount of length is changed in the array modifier.
I may not be the best modeler, but maybe someone will find some use for this.
Barbed toy.png shows off one of the ways you might use this.