This trim is a bias binding piping in the medium size, which has (approx.) 4-5mm cord with 7mm tail. We are one of the UK's biggest bias binding suppliers and stock many types and varieties that aren't available anywhere else. The 5m lengths are pre-cut and multiple purchase may be sent as individual 5m lengths and not as a continuous length. Please note that we also sell 25 metres rolls and it would be cheaper to order 25m than it would to order 15m from this listing. This is because our 25m rolls are cut to the right length and packaged up ready to ship so we'll pass on a great saving to our costumers. Great for small businesses and designer/makers.