This product features an innovative self watering design. The terracotta material, being porous, can absorb water even without a drainage hole. The water is first taken in by the terracotta pot and then transferred to the potting soil, providing the right amount of moisture for the plants' roots. You simply fill the glass container with water to half cover the pot, and it will absorb water as needed. It has an overall height and outer diameter of 6.2 in. with the terracotta pot measuring 6.2 in. Dia and 5.9 in. height. As it is handcrafted, there may be slight size variations. The combination of a chic terracotta pot and a clear glass reservoir makes it both stylish and functional, suitable as a gift for plant lovers and fitting any decor style. Also, without drainage holes, there is no leakage of water or soil, keeping your tabletop clean. Each set includes a small terracotta pot and a clear glass cup, ideal for planting herbs, aloe, small spider plants, etc.