PLEASE READ BEFORE ORDERING: We offer twist-style ceramic Christmas tree lights in three different sizes. Our tree light guide is included in our photos and explains how to get the perfect light for your new or vintage ceramic Christmas tree. National Artcraft offers these lights in six (6) fade-resistant colors including: AQUA, BLUE, CRYSTAL CLEAR, GOLD, GREEN and RED. These small twist lights are also available in PURPLE and ORANGE (sold separately). SMALL-size twist light ornaments are 7/8" tall and 1/4" wide and the stem is 3/8" long and 1/8" in diameter. Bulb size is generally determined by the hole size in your branches and the overall size of your tree. Since most ceramic trees are handmade, they are all uniquely different. Hole sizes are not consistent on every tree...or even on every branch of the same tree! Some lights may need adjusting in order to fit into an uneven hole. Sticky craft dots or a drop of craft glue can help keep lights upright in oversized holes. Our stem sizes are industry standard. You can decide which size bulb is the right one for your tree size. The larger the tree, the bigger the bulb. We sell SMALL, MEDIUM & LARGE twist lights in a variety of festive shapes and colors! A US company in business since 1949, National Artcraft is a name you can trust.