Yes, when used properly and fitted securely on a standard size crib mattress (27.5 x 52 in / 70 x 132 cm). However, no product can “guarantee” safety. Nanit is not a medical device. Nanit is a connected product designed and intended to continuously learn from the data it collects to help you understand your baby’s sleep patterns. Height measurements are assessed using computer vision algorithms and are estimated – Nanit makes no guarantee that they are 100% accurate. Medical decisions should never be made using Nanit growth data. Nanit should not substitute for the care and oversight of an adult or consultation with medical professionals.