DD is 13.5 months and has always worn her baby deedee sleep sack to sleep. I probably need to get her a bigger size soon since her height is almost at the limit. But then I'm wondering if I should get her a bigger size sleep sack or transition her to a blanket? Im leaning towards the sleep sack cuz I don't think a blanket will stay on her but curious to hear what others are using. How old is your LO and what do they sleep with?