To begin, I sewed the retainer piece of material to the band piece. It is secured on both ends so that you have a closed loop to which you will attach the watch with the spring bars. For the band itself, I folded the material over 1/4 inch on one edge. I folded the other edge over 1/4 inch as well. I did this so that no frazzeled edge would be showing, and would leave enough space to insert the elastic band thru the "tunnel" created by sewing on both sides of the band at just a little less than 1/4 inch on each side of the band to maintain balance.