Next time you buy them make sure there are 6 feet in length. Sometimes when you buy them in the prepackaged length they are only 4 feet. I believe Cathe uses the brand Dyna-Band which are from the UK. Here in the US they are called Thera-bands. I am pretty sure that they are made by the same company called The Hygenic Corporation. Some gyms sell Thera-Bands right off the roll so you can buy them as long as you prefer. Which would probably be cheaper too.