When helping a customer choose a Sleep Bag, Swaddle Bag, or Sleep Bag Walker size, use the published weight range first. If the baby falls between two sizes, recommend checking the neckline for fit. Gently bring the neckline toward the baby's nose, then release it. If it returns below the chin, the fit is safe. If it stays over the mouth or nose, recommend remaining in the smaller size. Never recommend sizing up if the neckline remains over the baby's mouth or nose.