Watch Case & Lug-to-Lug Sizing Engine 🔧 Engineering Calculator · Calculates Anatomic Wrist Span & Maximum Wearable Lug Boundary Wrist Circumference: 6.75 in (17.1 cm) 5.5" (Slender)6.75" (Average)8.5" (Broad) Wrist Profile / Cross-Section: Flat Top (Wide lateral surface area) Round / Cylindrical (Narrower top landing span) Calculated Ergonomic Boundaries Max Lug-to-Lug48.0 mmZero overhang Sweet-Spot Diameter38–40 mmBalanced proportion Strap Width20 mmProportional taper Recommended EDC Match For Your Wrist: