Measurements: Length: 38.5cm - Width: 23cm - Height: 6cm approx. Give your tiny seedlings a healthy start with the help of a trusty seed tray. They are great for drainage and keeping your crops separated from one another. Whether you're a green fingered pro or a newbie looking to start your first veg patch, seed trays are a useful piece of kit that help to kick off the planting process. Represent one of the most economical containers in which to grow many types and varieties of plants.