Too Tall Christmas Tree . Cut 2 12 wide strips of plywood the full length of your square. Also, i show you what you can do if your tree is too short for your room. Skinny Primitive Christmas tree with handmade ornaments takes up from www.pinterest.ca So back it went.special thanks to the hinkemeye. If you plan to use a tree topper, subtract 12 inches from your ceiling height. I feel qualified to answer this christmas tree issue: