About Strap Index

Strap Index is a free database of watch strap sizes. Look up any watch to get its exact lug width, spring-bar size, and the strap styles that actually fit — before you spend money on the wrong one.

Buying a strap should be simple, but manufacturers bury lug widths in spec sheets and PDFs, and the odd sizes (19mm, 21mm) trip people up constantly. We put the answer front and centre for every model.

How we make money

When you buy a strap through one of our links, we may earn a small commission at no extra cost to you. As an Amazon Associate we earn from qualifying purchases. That's what keeps the database free.

Accuracy

Lug widths are our primary, checked field. Secondary specs are widely-cited reference values — always confirm against your specific reference before buying, especially for watches with multiple case sizes.