This tie back is a GREEN rope with small dark specks throughout the rope. We recycle the rope from Alaska fishing gear so it is a bit faded and more of a turquoise in color curtain tie back, which is a wrap around type that starts with a monkey fist ball knot that will go through a loop that is spliced into the same line used for knot. It is a 4 wrap knot and diameter approximately 3-1/2"= (the ball size) . Choose length from 10" - 19" and wrap around curtain then insert ball into loop and walk away from a beautiful window treatment.
To measure properly: take a string and put it around the curtain where you would want the tieback to hang and then measure that string and that should be the length you choose.