Jelly Rolls are 40 strips the full width of the fabric. They are cut 2.5 inches long and are fabrics from a specific collection or coordinating quilting fabrics. The strips are rolled together and make a really neat round tied off package.
The pre cut strips allow the quilter to buy a great selection of material and reduce cutting time. Many quilting patterns call for using the Jelly Roll.
Thus the advantage is you are buying a great selection of fabrics the same size. Plus the quilter does not need to buy 1/2 yard of each fabric if this much is not needed.
What can you do with a Jelly Roll? There are endless possibilities using the Jelly Roll Strips.
The importance is the accuracy of the cuts you receive. This is a huge time saver for you. Jelly Rolls are packaged by the manufacturer or custom made by the seller.