We do not recommend sizing up. While you may be thinking about the length (and longevity) of the sleep bag, and that it may seem like a better value to buy something your baby will 'grow into', you want to be certain that the sleep bag is well-fitted around your child's upper body for a secure fit. The goal of a good fit in a baby sleeping bag lies more in the chest and neckline than in the length. As the sleep bag size increases, not only the length increases, but the chest width, neck opening and the arm openings, too.
Please use our recommended sleep bag sizing guidelines to find the correct size based on your child's height & weight. Size guides can always be found in the product images.
Feb 20, 2025