Your FKM Rubber Strap, Sized to Your Wrist

Most straps make you settle for “close enough.” This one doesn’t. Your BARTON FKM rubber strap arrives in one length of segmented links, ready to be trimmed down to your exact wrist before clicking the included deployant clasp into place. The result is a glove-tight, made-to-measure fit you can’t get from a one-length buckle strap — and the steps below will get you there in about ten minutes.

What You’ll Need

Lay everything out before you start. Clear a flat, well-lit surface and give yourself a few uninterrupted minutes — rubber doesn’t grow back, so the goal is one calm sitting, not a rush job.

• Your BARTON FKM rubber strap. Arrives as a single segmented length with quick-release spring bars and a deployant clasp.
• Your watch. Existing strap removed. (See the BARTON guide on swapping a strap if you need a hand.)
• Sharp, flat-edged scissors. Heavy kitchen or sewing shears work well. A fresh hobby blade and cutting mat work too.
• A soft cloth or mousepad. Protects the caseback and your tabletop while you work
• The spring bar tool included in your order. For seating the spring bars cleanly into the clasp.

Quick Anatomy

Your strap has two tails extending from the watch case. Each tail is built from molded segments separated by shallow cutting grooves. Spring-bar holes sit at every segment, so wherever you trim, there’s a hole ready to receive the clasp.

 

Six Steps to a Made-to-Measure Fit

1. Attach the strap to your watch:
   With the watch face-down on a soft cloth, slide one tail’s quick-release spring bar into the lugs and click it into place. Repeat on the other side. Give each tail a light tug to confirm both spring bars are fully seated. Both tails should now be full-length and loose.
2. Find your length (dry-run first):
   Lay the watch face-down again. Rest your wrist palm-up on top of the case so the strap tails fall naturally over each side of your wrist. Bring the two tails together above your wrist until they meet comfortably — not pulled tight, not loose. Note how many segments would need to come off each side. Wrists are rarely symmetrical, so don’t expect the counts to match. 
   
3. Cut one side — leave an extra segment:
   Pick the side with more excess. Position your scissors squarely in the cutting groove of the segment one past your dry-run mark, then make one clean, perpendicular cut. A square edge matters more than speed: an angled cut will sit unevenly inside the clasp.
   
   
4. Click the clasp onto the cut tail:
   Use your spring bar tool to seat a spring bar through the last hole on your trimmed tail, then click it into the corresponding slot on the deployant clasp. Make sure the clasp’s hinge opens away from your wrist. Tug gently to confirm the bar is fully home.
   
   
5. Try it on — aim for slightly loose:
   Wrap the watch around your wrist and close the deployant by folding it slowly to avoid pinching skin. On the first attempt, the strap should feel slightly loose — you’ll tighten on the opposite side next. Hold your arm out, flip it palm-up, and check that the watch face is centered on top of your wrist.
6. Trim the second side to dial in the fit:
   Open the clasp, remove the un-cut tail, and trim it one segment at a time, re-checking the fit after each cut. Stop when the watch sits centered and you can slide a fingertip easily under the strap. That’s your fit, made to measure.

Tips & Common Mistakes

Cut one segment at a time when in doubt.

Every cut is permanent. The fastest way to ruin a strap is to be optimistic with the scissors. If you’re between two segments, choose the longer one — you can always trim more. 

Expect uneven cut counts on each side.

Most people’s wrists are asymmetrical, and the watch case itself takes up space between the two tails. It’s normal for one side to be one or two segments shorter than the other — what matters is that the clasp sits centered on the underside of your wrist. 

Cut perpendicular to the strap, not the groove.

Aim for a flat, square edge. A slight angle won’t show on the outside, but it can make the segment sit unevenly against the deployant clasp. 

Close the clasp slowly the first few times.

A leaf-spring deployant can pinch skin if you snap it shut on top of an arm hair. Fold it in stages until you’ve learned how your strap closes — then it becomes one easy motion.

Don't do this

Cutting both sides equally.

The watch case fills part of the gap between tails, so cutting the same number of segments off each side almost always pulls the clasp off-center.

Trimming for a snug-from-the-start fit.

Skin and rubber both move during the day. Start slightly loose; you can shave one more segment tomorrow if the fit drifts.

Quick FAQ

I cut a segment too many. Now what?

Email us at customerservice@bartonwatchbands.com and we’ll do our best to help. The BARTON Guarantee covers the first year, so don’t hesitate to reach out.

Can I shower, swim, or surf with it?

Yes. FKM rubber is truly waterproof and shrugs off sunscreen, salt water, sweat, and UV without fading or turning sticky. Rinse it with fresh water afterward, pat dry, and it’s ready for the next swim.

How do I clean the strap?

Warm water and a soft cloth handle almost anything. For deeper cleaning, mild soap is fine. Avoid harsh solvents — you won’t need them. Will it fit my watch? Your FKM cut-to-size strap is sized by lug width. If you’re unsure of your watch’s lug width, the BARTON Fitting Guide walks you through measuring it in under a minute.

Can I move this strap to a different watch later?

Yes, as long as the new watch shares the same lug width. Bear in mind the strap is already cut to your current wrist, so the fit on the new watch depends on its case size.

What if my wrist size changes over time?

The deployant clasp includes a touch of micro-adjustment, so small changes are absorbed without another cut. For bigger shifts, a replacement strap is the cleanest fix.

 

That’s it — a strap shaped to your wrist, not the other way around. Every BARTON product is backed by our full-satisfaction guarantee for the first year, so if anything about your strap isn’t living up to it, email us at customerservice@bartonwatchbands.com and we’ll make it right. Thanks for letting us be part of your watch collection.