I knit 4 i-cords, red, green, blue, yellow. There were about 14 inches long each (I measured just for you).
I sewed/wove one of them together in a circle first (the green one) and then looped the red one though and wove it together.
I wove each end of the i-cord to the other and then I tied a knot with the two ends. These should felt away in the wash (notice I keep going from present tense to past tense...yes, it was one of those nights last night).