This Jaw Trainer/Jaw Exerciser is a great addition to your home workout routine. Its unique sphere shape and clear plastic case make it easy to use and store. The trainers are made of durable silicone material and come in a stylish white color. The product package dimensions are 2.6 x 2.52 x 0.75 inches and the item dimensions are 2.56 x 2.56 x 0.79 inches. The product weighs 0.05 kilograms and is perfect for gym and training activities. This item is a must-have for anyone looking to improve their jaw muscle group.