Will fit most standard seed trays.Grow healthy plants from seed in your home or greenhouse.Suitable for striking cuttings. Grow like the professionals.Instructions for use:As plants grow allow ventilation by propping open one side of the lid by approximately 1cmPlace in a bright position but not in direct sun lightNever allow compost to dry out, keep moist at all timeSize Check: 23cm (9″) Long 18cm (7″) Wide 8.5cm (3.25″) High