Nanit smart sheet is new and unused still in box. *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 Place your baby on the sheet and the Nanit 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