1 oz. Bundles of assorted hair. Each bundles is sized by the average hair length of that bundle. While a bundle may have a variety of hair lengths, the sizes given here are the average hair for that bundle. It takes approximagely 3 bundles (one long, one medium and one short) to make an 18" roach. If you are buying to make a roach, buy a variety to ensure you have enough of all the necessary lengths.