Doll lines refer to the distinct lines or seams found on the surface of dolls, which are often used in the manufacturing process. These lines can indicate where different parts of the doll are joined together, such as the head, arms, and legs. They are typically more noticeable on plastic dolls, like those made by Barbie or American Girl, and can affect the overall appearance and realism of the doll. In addition to their functional purpose, doll lines can also serve as a design element. Some collectors appreciate the craftsmanship involved in creating these seams, while others may prefer dolls with smoother surfaces. The presence of doll lines can influence a doll's value and desirability among enthusiasts and collectors.