There are 4 sizes in one package: You will get 4 cups with a diameter of 2.95 inch/7.5cm for whisker foam, 4 pieces of foam for a cup with a diameter of 3.15 inch/8cm, and 4 pieces of foam with a diameter of 3.54 inch/9cm cup whisk foam, and 4 cup whisk foams with a diameter of 3.94 inch/10 cm; 4 sizes total, 16 sponges for your choice. High-quality material: Our products are made of high-quality memory foam material, which is soft to the touch and good elasticity; not easy to break and deform, can be used for a long time, soft enough to adapt to various cup shapes, giving you a safe and reliable experience. Bonus Tip: After receiving the cups, please unpack and let them stand until they regain their shape. perfect friction: grab the cup from the inside, keep the rotation of the cup stable, easy to adjust its position in the cup, which will bring you more convenience. Fits 1/2 inch (about 1.3cm) PVC pipe: This cup stirrer foam will fit nicely with 1/2 inch (about 1.3cm) PVC pipe, which means your PVC pipe should be 0.84 inch (about 1.3cm) in diameter 2.13 cm); the foam center hole diameter is 0.75 inches (about 0.75 cm) / 0.75 inches (about 1.9 cm); the diameter of the foam center hole should be smaller than the diameter of the PVC pipe to keep the PVC pipe tight. Specially designed for pourer: just DIY your own glass mug, protect your mug from slipping off, and attach your mug to the PVC pipe of the pourer; make sure the size of the opening of the cup, and always use A slightly larger foam than the cup, not a smaller one. Colour: Black+Pink Material: Sponge Package Contents: 16 * Cup Turner Foam