The neck of this hopper is 2 3/8 inches in diameter. It will fit into any food strainer body that is just a little bit larger. It is a sturdy one piece design and will replace many 2 piece strainer hoppers. The hopper has a steeply tapered cone portion that allows food to slide right down into the spiral of the strainer. Flat bottomed hoppers create more work, requiring you to move the food from the outer edges and pushing it into the hole. Since it is a one piece unit there are no extra parts or adaptors to get lost. The large top portion of the hopper is 8 3/4 inches in diameter and 2 3/4 inches deep, then it tapers down to the neck. This extra large volume holds more food to process through your strainer.