The Nitetronic T3 Pro Smart Mattress Pad is available in a convenient single size, measuring 90 cm x 200 cm x 6 cm (approximately 35.4 inches x 78.7 inches x 2.4 inches). For those needing a larger sleeping area, you have the option to purchase two units. By placing them side by side, you can easily create a custom queen or king-size surface, ideal for couples wishing to share a comfortable sleeping space.