Approximate dimensions: ) : 6 x 7 cm. Please check the size before purchasing. Please allow about 0-2cm differences in size. Material: Made of high quality crystal glass, smooth surface, solid and durable. Perfect fish tank decoration supplies. Reasonable design: The bottom of the pot with permeable holes. The angled design allows plants to receive sun and light easily. Each glass jar comes with 2 suction cups. Easy to move and hang firmly on the aquarium. Wide Application: Our glass jar is perfect for regrowing aquatic plants for all types of freshwater and saltwater aquariums. Great decoration for shrimp or planted aquariums. Add a natural feel and look to your tedious aquarium. Package: 4 glass water cups with suction cup. Provide your fish with a dreamland to swim and hide in, help them feel safe and also increase visual interest.