Just wondering how many months onwards should a baby stop using yao lan?

If the baby gets a little too snug in the yao lan, it is a sign to stop using because it will no longer be comfortable for baby. This usually happens after a year or earlier, depending on how fast your baby grows. My friend's son stopped using his yao lan after 8 months because his apparently his legs were sticking out. He is quite a big baby though but his sister, who is smaller, used the yaolan past a year old.