I am honestly not sure.

Are we talking finished length? Length of fabric before making said tarp or hammock?

For the folks that advocate for 12ft hammocks or tarps, are they actually 12ft in finished length?

I've made several hammocks from 4yd fabric pieces, but by the time I roll and sew the end channels, it is more like 11.5ft. Is that a 12ft hammock?

I've never purchased a 12ft hammock from a vendor, are they 12ft finished?