2" x 2" x 2" Grodan Stonewool A-Ok Starter Plugs is perfectly-sized to fit a standard flat and each plug has a pre-formed hole to easily plant seeds and cuttings. Once rooted, you can transfer individual A-Ok Starter Plugs to larger pieces of stonewool or plant them directly in soil. For any growing application, stonewool offers speed, ease of use and cleanliness. This is a single sheet of 50, two-inch square plugs.