Precision measurements could be brought to their ultimate limit by harnessing the principles of quantum mechanics. Particularly useful, to this end, are multi-particle entangled states of the ‘Schrödinger cat’ type, known as NOON states. Photonic NOON states with N entangled photons acquire a phase at a rate N times faster than classical light, and they can be used to obtain high precision phase measurements and super-resolving imaging, becoming more and more advantageous as the number of photons grows. However, such large-N states are notoriously difficult to create. We have generated ‘high-NOON’ states via the multiphoton interference of ‘quantum’ down-converted light with ‘classical’ coherent state. Super-resolving phase measurements with up to five entangled photons were demonstrated with a visibility higher than obtainable without entanglement. Most importantly, this approach is inherently scalable to arbitrarily high photon numbers, with with immediate implications to several areas of quantum measurements.