These Nuby replacement spouts will only fit the 10oz tall, Nuby sippy gripper cups. The spouts measure approximately 2 inches across the widest part of the spout. For best fit, please measure your existing NUBY spout. These are available in a variety of quantities. Clear, bpa free, soft medical grade silicone. These spouts will also fit the Nuby sport sipper 10oz tall cups.