Golden Ratio Calipers Eyebrow Ruler This precision design tool uses the PHI golden ratio 1 to 1.618 to map and measure eyebrow proportions that are widely regarded as aesthetically balanced. It helps create symmetrical, well positioned brows by providing an exact scale for locating key points and shaping both sides of the face. Key benefits Accurate proportioning: Built on the PHI golden ratio to guide eyebrow placement and sizing for visually balanced results. Symmetry made simple: Measure and match both brows quickly, reducing guesswork for beginners and experienced artists alike. Adjustable and versatile: Size adjusts to accommodate different eyebrow shapes and facial proportions. Durable for daily use: Designed for frequent use in professional settings or at home without losing precision. Time saving: Speeds up mapping and shaping steps during makeup, microblading, and permanent makeup procedures. Main features Scale: PHI golden ratio 1 to 1.618 for precise proportion guidance. Function: Measure, locate, and shape equal eyebrows on both sides of the face. Compatibility: Suitable for microblading, permanent makeup, brow mapping, makeup application, and beauty training. Portability: Compact and easy to carry for onsite sessions or travel. User level: Useful for beginners in permanent face makeup as well as experienced technicians. Use scenarios Microblading session: Map and confirm brow start, arch, and end points using the PHI scale to ensure symmetry before tattooing. Permanent makeup application: Adjust the calipers to fit the client facial proportions and maintain consistent measurements across multiple treatments. Daily makeup or DIY shaping: Use the ruler to quickly check alignment and symmetry when filling or trimming brows at home. How it helps The ruler provides a consistent reference based on a classical proportion. By using a standardized scale and adjustable sizing, it reduces measurement errors and supports repeatable, symmetric eyebrow results across clients and sessions. Simple to use, reliable in performance, and suitable for professional and use, this golden ratio eyebrow ruler is a practical tool for anyone focused on precise brow shaping and symmetry.