Description The White PD Ruler is a must-have for accurate pupillary distance (PD) measurements. With a 6-inch length and dual scales in both millimeters and 1/16″ inches, this ruler is perfect for opticians, DIY glasses fittings, or home use. Its clean white design offers excellent readability in any lighting, while the slim, durable build makes it ideal for everyday use. Compact enough to keep in a drawer, case, or toolkit, it’s a reliable solution for anyone managing their eyewear needs with precision.