Watch your baby grow in real-time by pairing our Smart Sheets with the Nanit Pro Camera. Place your baby on the sheet and the camera automatically reads the custom-designed pattern to estimate baby’s measurements—allowing you to track baby’s growth easily and accurately with our app. No sensors, electronics, or radars Watch Them Grow feature automatically creates a montage of baby’s growth for you to save and share Track baby’s progress between doctor checkups Dimensions: 27.5 x 52 in / 70 x 132 cm Fits standard size crib mattresses Made of soft, 100% cotton that’s machine washable and dryer safe HSA/FSA eligible