Check out this metal tree collar - a great holiday deal in the summer! If you chose you could even set it up the correct way around your tree (it's upside down in the first pic)

Trade in that old tree skirt and take the hassle out of hiding and protecting the base of your Christmas tree! Elevate your holiday display with modern décor as a modern alternative to a traditional tree skirt. Accommodates most trees with its 89 cm base diameter and 25 cm height. The tree collar can be assembled around your tree in minutes, no need to slide over your tree.