Blood Pressure cuffs only for manual blood pressure units come in different sizes: Infant, Pediatric/Child, Adult, Large Adult and Thigh units. It is important to use the proper size cuff. A cuff that is too big may be overlapped and wrapped. However, one that is too small will release when inflated and come off easily. The cuffs only need to be used with a sphygmomanometer gauge to get a blood pressure reading. Our cuffs typically are made of a durable nylon and depending upon the manufacturer may come in an assortment of colors, such as blue, black and/or grey.