Newborn clothes are typically designed to fit babies weighing between 5 to 8 pounds. However, it is important to note that each baby is different and grows at their own pace, so some babies may not fit into newborn clothes at all, while others may outgrow them quickly. It is also recommended to size up slightly, as "Newborn" clothes only fit babies up to 8 pounds on average, which for most babies, doesn’t last that long.