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[Forstner] Model J for Tudor Black Bay Series

SKU: Z-FORSTNER-023-BB20-J
Sale price$252.34 AUD
Size: 20mm (BB58)
Finding your Strap Width

How to Find Your Strap Size

Not sure what size strap you need? There are three ways to find out - pick whichever is easiest for you.

1
Quickest method

Check the Back of Your Strap

The fastest way is to flip over your existing strap and look for a number printed or stamped on the back. A number like 22 means your watch takes a 22mm strap - that's all you need to know.

Strap size printed on the back of a watch strap

Most smartwatches will show 18, 20, or 22 on the back of the strap or on the underside of the watch itself. The number refers to the strap width - how wide the strap is where it attaches to the watch - not the overall length of the strap.

Can't find a number? If there's nothing printed on your strap, use Method 2 below to measure it directly - it only takes a minute.
2
Most accurate method

Measure the Lug Width

The lug width is the distance between the two metal prongs (lugs) on one end of your watch case - this is exactly where the strap attaches, and it's the same as the strap width you need to order.

Diagram showing the four lugs on a watch and where to measure

Your watch has four lugs - two at the top and two at the bottom. Measure between the two lugs on either end (the red line in the diagram above). Both ends will give the same measurement.

  • Lay your watch face-up on a flat surface.
  • Place a ruler or tape measure across the top set of lugs.
  • Measure the gap between the inner edges of the two lugs.
  • That number (in mm) is your strap size.
Ruler measuring lug width on a watch Two ways to measure watch lug width - ruler and tape measure both showing 22mm

Both measuring methods in the image above give 22mm - so this watch takes a 22mm strap.

Avoid phone camera rulers Camera-based measurement apps are often inaccurate enough to give you the wrong size. A 1mm error is all it takes for a strap not to fit - use a physical ruler or tape measure instead.
Why our straps measure slightly under size Our 22mm straps actually measure around 21.95mm - this is intentional so the strap slides cleanly into your 22mm lugs. This is standard across the industry.

If you're still unsure, you can also measure the top of your existing strap where it meets the watch (marked A in the diagram below). Don't measure further down - straps taper as they get longer, so you'll get a smaller number than you need.

Strap component diagram showing where strap width is measured
3
No ruler needed

Look It Up on Google

For popular watch brands and models, you can often find the lug width with a quick Google search. This works well if you know your exact model name or number - manufacturers sometimes change strap sizes between models, so the more specific you can be, the better.

Search for:

[Brand] [Year] [Model Name/Number] lug width

For example:

Rolex 2016 Submariner 114060 lug width
Daniel Wellington 2019 Cornwall lug width
Example of a Google search result showing lug width for a watch model

If the lug width search returns nothing, try replacing "lug width" with strap width - both terms are used interchangeably.

Got an odd-numbered result? If Google returns a 21mm lug width, a 20mm strap will still fit - there'll be a small 0.5mm gap on each side. You'll also need to reuse your original spring bar for the strap to attach correctly.

View common smartwatch strap sizes →

The Story

We are such a fan of the Tudor Black Bay range of watches.  They are well-made, have a timeless design, and offer a relative value compared to offerings from their big brother.  However, we've long wanted to see additional bracelet options to pair them with -- in particular, classics like the jubilee-style bracelet that provide a more balanced wearing experience (including, for example, plenty of micro adjustment and a classic taper to 16mm).  

The present jubilee-style bracelet (we're calling the Model J) bracelet does just that.  Providing an overall more elevated look, the Model J bracelet has beautiful alternating polished/brushed finish, tapers to 16mm at the clasp, and is capable of more than enough adjustment.  Fitted to Forstner's milled clasp, the bracelet looks and wears like a dream.   

Construction

  • Solid 316L stainless steel, including solid steel end piece.
  • Classic jubilee design with polished/brushed finish.  Bracelet sides are also polished to match the case finishing.  
  • Links removable conveniently via a single-screw system.
  • Milled push button clasp with polished/brushed finishing (clasp includes 6 micro-adjustment holes).

FIts

  • 20mm size fits Tudor Black Bay 58 and Ranger 39
  • 22mm size fits Tudor Black Bay, Black Bay GMT, and Black Bay Chronograph
  • DOES NOT FIT Black Bay Pro and BB58 GMT

Length/Width

  • Tapers from 20mm or 22mm (as selected) at the widest bracelet link to 16mm at the clasp.
  • Milled clasp measures approximately 18.5mm wide.
  • Bracelet length is adjustable (via single screw system and micro-adjustment in clasp) from approximately 120mm to 180mm (fits wrists ranging from approximately 6 to 8 inches). Screwdriver included for sizing.

Finish

Brushed outer links, with polished inner links.  Bracelet sides are polished to match the finish of the case.  

Included

Spring bars, screwdriver, one pair of end links.

Shipping

FREE shipping over $30 AUD.
FREE International postage over $110 AUD.

Will this fit my watch?

This strap is specifically designed for a specific watch model.

Please check the description to see if your model is there. If your watch is not listed there, chances are it won't fit.

Each watch is different and the curvature of the case as well as spring bar hole positioning is different so it's impossible for us to know if this will fit your watch without testing it.