This 11-minute tutorial from Roboflow demonstrates how to train custom AI models to accurately measure physical object dimensions, from children's Lego pieces to industrial products on assembly lines. Learn to avoid common pitfalls like incorrect model selection while mastering techniques for input calibration and measurement precision enhancement. Discover essential processes including lens distortion correction, perspective adjustment during image processing, and camera-specific model calibration to achieve optimal results. Perfect for developers and engineers looking to implement precise AI-based measurement systems in various applications.