Jelly Roll Rug designed by Roma Lambson of R.J. Designs. Use a jelly roll and batting to make a great area rug. Approximately 30in x 44in area rug made from one Jelly Roll, forty-two 2.5in fabric strips, and 100 percent cotton batting. Cut your own or use the Katahdin on a Roll 2 1/4" x 50yds Item #390k 50 We find the 2 1/4" better when trying to fold your fabric around it.