A thimble is a small, protective cap worn on the finger while sewing. It is typically made of metal, plastic, or leather and helps to push the needle through fabric without hurting the finger. Thimbles come in various sizes to fit different fingers and are often used by seamstresses and tailors. Thimbles have been used for centuries, with some of the earliest examples dating back to ancient civilizations. They can also be decorative, featuring intricate designs or engravings. Collectors often seek out unique or vintage thimbles, making them a popular item in sewing and crafting communities.