1/4 medium 4.5 ounces force. 100 rubber bands in a pack, Amber color. These little beauties are just the ticket for finishing double ended dreadlocks or open ended braids! Cayenas Corporation Orthodontic Rubber Bands are very hard to break, unlike most of the rubber bands on the market!! They are 1/4" in diameter when un-stretched. They have a slight yellow color to them because of the high tech polymers that give them a power packed stretch.