Christmas trees are typically evergreen trees, like pine or fir trees, which are known for their beauty and longevity. They have thick, lush needles and sturdy branches, making them perfect for holding decorations and lights during the holiday season. Christmas trees come in different shapes and sizes, ranging from small tabletop trees to towering giants that can reach over 20 feet tall. The most popular types of Christmas trees include Nordmann Fir, Norway Spruce, Douglas Fir, and Colorado Blue Spruce.