BJD stands for "Ball-Jointed Doll," a type of collectible doll characterized by its articulated joints, allowing for a wide range of poses. These dolls are typically made from resin and can vary in size, with some being as small as 10 inches and others reaching over 30 inches tall. BJDs often have customizable features, including different face sculpts, skin tones, and hairstyles, making them popular among collectors and artists. The BJD community is vibrant, with enthusiasts often sharing their creations and modifications online. Many collectors enjoy dressing their dolls in unique outfits and creating elaborate backstories, while others focus on photography and art. The popularity of BJDs has led to a variety of related products, including clothing, accessories, and furniture designed specifically for these dolls.