Dimensions: 10.04 x 0.39 x 0.31 inches (large) - Intended for pot sizes of 6 - 12. Senses water at root level, no dirty fingers & roots trying to gauge soil moisture Award-winning product design, environmentally friendly, and maintenance-free (no battery required). Keep your hands clean by visually monitoring when your plant needs water Extend the life of your beloved houseplants with the Aquameter soil moisture meter for indoor and outdoor plants. is designed and made in Japan and is the perfect addition to various houseplants. It has a slim, minimalist aesthetic that doesn't take away from the beauty of the plants, harmoniously blending in when left in the soil. It works with almost any plant that grows in the soil. When using the moisture testing stick, the white color indicates that the plant needs watering, and the blue color indicates that it has enough water. The core insert that determines if watering is needed can also be manually replaced. This leave in soil moisture meter is maintenance-free. A perfect plant watering indicator for potted plants. It is recommended to replace the refillable core of your after 6-9 months of use. has won multiple international awards including the Reddot Design Award, Germany Design for Asia Award, and the Japan Good Designs Award. The large size is meant for pot sizes 6 - 12. Two sticks are included. Meet: is a modern, Japanese soil moisture sensor. The blue color indicates that there is enough water in the soil, and the while color indicate that plant is in need of watering. features a minimal aesthetic that doesn't take away from the beauty of your plants. Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Dimensions: (small) - Intended for pot sizes of caliber 25-36cm - Ideal for large succulents The Aquameter is a leave-in soil moisture sensor pen that can be left in the soil for continu