These Christmas trees are made by first cutting the clear glass base, then decorating with a variety of colored glass strips, stringer, enamel enhancements, millefiori, glass confetti, and hand-cut pieces. All are Bullseye glass, premium fusible glass manufactured in Portland, OR, USA. The little trees are then put in the kiln and fired to a contour fuse to preserve the lovely texture of each. Copper rods are attached to the back of each with a permanent adhesive. The glass trees now come in 3 sizes: small (4" x 6"), medium (5" x 7"), and large (6" x 8"). The wooden bases are about an inch to 4 inches in diameter add another 1 1/2" to 3" in height, depending on the size tree you choose. Choose size option at checkout. The last two photos in this listing shows off these trees with some of their friends :-). Check my other listings for more fun glass Christmas trees. The bases are aspen, birch, apple, or maple wood sealed with several layers of clear sealant and drilled holes to hold the glass trees. If you like this design but would like to modify with color or size, I can also make you a custom order. FREE SHIPPING IN THE CONTINENTAL U.S.! (If in Hawaii or Alaska, please message me so we could work out the shipping charges).