5 tools

Jewelry & accessories

Tools for jewelry and accessories: calculate your ring size and measure watch-strap width to get the right fit, right in your browser.

Watch Battery Finder

Find the exact battery for your watch by model.

Estimate the weight of set stones from their measurements: carats, grams, net metal weight. Diamond, cubic zirconia, sapphire. Online, no install.

Measure the lug width on your calibrated screen, or print a true-to-size gauge — then order the right replacement strap.

Pick a method below. Everything runs in your browser.

Wrist → ideal case diameter, lug-to-lug, strap width