I purchased these to be hold a dvd player on the back of a headrest; I was in a hurry and did not see any size measurements but I figured they would probably work. These are small! I do not know what they could be used for as an adult, but my son loves to use them as tow ropes for his trains. My daughter uses them as rescue ropes for dolls and to play a game similar to barrel of monkeys. She asked me to order more them, as they are so much fun! They measure about 9 inches from hook to hook unstretched, stretch and additional 2-3 inches more. They are very cute.