Precise head-size measuring tool with a high-precision scale that ensures a comfortable fit and fail-safe calibration technology for reliable head circumference accuracy with every use. Non-slip grip head circumference measurer with an ergonomic handle and stable non-slip grip. It conforms to palm contours to reduce fatigue and features automatic rebound-reset technology to simplify continuous use. Durable material inner tape measure with cap. Built from robust materials to resist wear and environmental factors, it maintains long-term accuracy and offers a refined, durable appearance suitable for repeated use without degradation. Efficient workflow for sewing and quilting operations. Optimizes production through efficiency-driven processes, using precision-integrated manufacturing and advanced pattern optimization for reliable data capture with the inner diameter. Typical use scenarios: - Sizing hats, caps, and protective headgear for adults and children in fashion, sports, or safety contexts. - Crafting, cosplay, or custom headwear where precise measurements improve fit and pattern accuracy. - Small-batch tailoring or atelier projects that require repeatable, accurate head circumference data for consistent results.