Ready to use for your model it also comes with 4 different grass types so you can change it on fly. Its a square and reason for it is so you can tile it next to 1 and create a huge surrounding area. Check out the screen shoot to get an idea.
The height of the grass can be adjusted as well
IMPORTANT
You can use the file only if the Hair module is installed.
This is for Cinema 4d
It comes with (.c4d) file