An Infantometer is a medical measuring device (typically 0-100 cm range, 1 mm graduation) designed for accurate recumbent length measurement of neonates, infants, and children up to 2 years of age. Features include rigid base board, fixed headboard, movable perpendicular footboard with smooth-gliding mechanism, and measurement scale (analog engraved or digital display). Constructed from medical-grade materials (wood, acrylic, ABS plastic, aluminum/stainless steel) with non-porous, easy-to-clean surfaces and rounded safety edges. Accuracy ±1-2 mm meets WHO and CDC requirements for growth monitoring. Primary clinical applications include accurate length measurement for growth assessment (WHO/CDC growth charts), early detection of growth abnormalities (failure to thrive, growth retardation), nutritional status monitoring (weight-for-length), premature infant follow-up, endocrine disorder evaluation (growth hormone deficiency), genetic syndrome assessment (syndrome-specific charts), and research studies requiring precise anthropometrics. Class I medical device. Critical safety considerations include two-person measurement technique, proper infant positioning (neutral head, gentle leg extension), infection control (cleaning between infants), stability on level surface, and regular calibration verification. Essential equipment in pediatric clinics, well-child visits, NICU, and child health research.