This beet is deliciously sweer with tops that can be harvested as greens. 3-4" roots and extra tal, flavorful tops for harvesting are dual-purpose. You can cut the 18" tall greens and use them in lieu of spinach, kale, or chard for something different. 
 
Size of beet: 3-4 inches
Height (mature): 10-12 inches
Width (mature): 5-8 inches
Sun: Full sun