How tall and wide does a desert gem cacti gets?

Desert gem cacti, also known as Echinocactus polycephalus, typically grow to a height of about 12 to 24 inches (30 to 60 cm) and can reach a width of 12 to 18 inches (30 to 45 cm). Their globular shape and vibrant colors make them popular in gardens and as houseplants. They thrive in well-drained soil and require plenty of sunlight.