◷ STRAP INDEX

Guide

Integrated, Proprietary & Smartwatch Straps

Some watches don't use the usual pair of lugs and a spring bar, so a normal strap won't attach. Here's which watches in our index fall into that group, why, and how to get a different strap on anyway.

By the Strap Index team · Published 20 October 2026 · Updated 26 October 2026

What “integrated” means

An integrated strap or bracelet flows straight out of the case with no standard lug gap, as on the Tissot PRX. A proprietary fitting has some kind of mount, but it's unique to the brand or model, like a G-Shock's resin lugs or a smartwatch's slide-in slot. Either way, a normal 20mm or 22mm strap won't attach on its own.

Integrated bracelet watches

  • Tissot PRX 40 — Integrated case: straps attach with Tissot's quick-release bars. Use straps made for the 40mm PRX.
  • Tissot PRX 35 — Integrated case: use straps made for the 35mm PRX. 40mm PRX straps are a different size.
  • Citizen Tsuyosa — Integrated bracelet — no standard lugs.

Your options are the maker's own straps, model-specific aftermarket straps shaped to the case, or (for some models) adapters.

G-Shocks and other resin Casios

These use moulded resin straps attached with short bars inside the case's own lug shapes. Aftermarket adapter kits bolt into that space and convert it to a standard lug width so you can fit NATOs, rubber or leather. Check which width the adapter gives you before buying straps.

Smartwatches with proprietary bands

Apple Watch bands come in size families. Apple's own guidance: bands for 38, 40 and 41mm cases are interchangeable; bands for 42 (earlier models), 44 and 45mm cases are interchangeable; and 46mm and 49mm bands also fit 44–46mm cases. Newer generations have reused some numbers; our Apple Watch band size guide untangles them. Garmin watches with QuickFit take QuickFit bands in 20, 22 or 26mm; see Garmin band sizes. Google Pixel Watch and Fitbit bands are proprietary to each model line, and Samsung's newest models have their own fitting too (Galaxy Watch band sizes).

Smartwatches that take normal straps

Samsung Galaxy Watch 6 (44mm), Garmin Forerunner 265 and Huawei Watch GT 4 (46mm), among others, use ordinary spring bars, often quick-release, so any strap of the right width fits. Look them up in the finder for the exact width.

Buying adapters: what to check

  • Exact model compatibility. Adapters are shaped for specific case references.
  • The output width, so you know which straps to buy next.
  • Overall length. Adapters stick out past the case, so the watch wears longer on the wrist. See our wrist-fit guide.
  • Screws versus spring bars. Screw-in adapters are more secure; keep a drop of threadlocker handy.

Quick answers

Can I put a normal strap on a G-Shock?
Not directly on models with proprietary lugs, but adapter kits convert them to a standard width so normal straps fit.
Do Apple Watch bands fit across sizes?
Within a size family, yes. Per Apple, 38/40/41mm bands are interchangeable, as are 42 (earlier models)/44/45mm bands; small and large families don't mix.
Will a normal strap fit the Tissot PRX?
Not the integrated-bracelet versions. You need PRX-specific straps, which clip into the case's own fitting.

More guides

Watch Strap Size Guide & Chart→Watch Strap Length Guide & Calculator→What Size Watch Should I Wear?→Apple Watch Band Size Guide→Garmin Watch Band Sizes→Galaxy Watch Band Sizes→How to Change a Watch Strap→Spring Bar Sizes Explained→Watch Strap Types Compared→19mm & 21mm Watches: Straps for Odd Lug Widths→