ContentSize: You will receive 50 growing sponges. Before soaking, the size is approximately 5.3 x 1.6 x 1 cm / 2.1 x 0.6 x 0.4 inches, and after soaking, the size will be larger, measuring approximately 6.8 x 2 x 1.3 cm / 2.7 x 0.8 x 0.5 inches. This quantity is sufficient to meet your daily needs for hydroponic plants.Dry processing: These root growth sponge plugs are all dried before transport. Only when attached to water can the seed pods begin to germinate. At the same time, the size will increase after soaking.Premium Material: Our seed starting plugs are made of high-quality sphagnum peat moss, which is ideal for aiding plant germination. With these sponge seed pods, seedlings can easily be transplanted into the ground after rooting. They are environmentally friendly and biodegradable. You can use them with confidence.Easy to use: You can easily use the growing sponge without any tools. Simply remove the old sponges and replace them with new growing sponges. The bottom of the seed pods is sealed to ensure your precious seeds don't fall into the water.Wide application: A good choice for growing various vegetables, plants, herbs, flowers, strawberries, tomatoes, peppers, basil, etc. Compatible with an Aero garden for hydroponic growing systems. With these growing sponges, you'll have a wonderful "all-seasons like spring" experience.