Pattern for a modular rug made out of circles of various sizes in different colors. The pattern does not give a specific yarn or gauge. You can use any T-Shirt yarn/rope with basically any gauge. Pattern suggests a 12 mm hook but states you should go up or down depending on how tight you want the fabric to be. It gives an estimate of 5000 g of T-Sirt yarn for the whole rug, with a finished size of about 100 cm x 135 cm