Tree Strap Length

[J_Squared]

This seems like a painfully obvious thread topic, however, I searched a couple of times and came up empty.

Question: What is the optimum tree strap length?

I assume the answer is going to very by location since trees here in the Mid-Atlantic seem to be most prominently second growth which tend to be tall and thin. I do most of my backpacking along the AT between TN and PA and in WV. I consider myself a lightweight backpacker, not UL so I don't want to carry a bunch of extra strap around just to put extra wraps on small trees, but I don't want to have to use rope to extend my tree straps every night either. So I'm looking for opinions from folks in this area who like or dislike a specific length of tree strap.

Is anyone using one 6' strap and one 8' strap (for example) since no two trees are ever the same size? This would cut down on weight and give you a little more flexibility.

Clarification: I am referring to tree hugger length such as you would use with a rope or whoopee suspension.