Long, narrow planter designed to sit on a windowsill. No holes and watertight  so it won’t dribble on your windowsill. Holds 3 small plastic pots or supermarket potted herbs. You might have to squeeze the plastic a bit to get it in. Or you can plant direct, just be careful to not overwater. Good for succulents, cacti, herbs and growing on cuttings. 
Length 26cm approx, height 11 cm approx, 12 cm approx. You will get the exact planter in the image.