21 mm lug width watches
2,444 watch references in our index have a 21 mm lug width (8% of watches with a confirmed width). A 21 mm strap fits those with standard spring bars.
Brands with the most 21 mm watches
Verified 21 mm watches
Examples of 21 mm watches
- Festina acero classico (21mm)21 mm
- Festina Automatic (21mm)21 mm
- Festina Chrono (21mm)21 mm
- Rado Captain Cook 42 Bronze Blue21 mm
- Rado HyperChrome Automatic Diamonds (21mm)21 mm
- Rado Coupole Open Heart Automatic21 mm
- Citizen Arcly Eco-Drive Minimalist Silver21 mm
- Citizen Eco-Drive AT Sports Silver21 mm
- Citizen Eco-Drive BY Chronograph Black21 mm
- Frederique Constant Classics Runabout Automatic GMT Navy Black Rubber21 mm
- Frederique Constant Blue Steel Bracelet21 mm
- Frederique Constant Peter Speake21 mm
- Seiko Flightmaster “Flieger Quartz”21 mm
- Seiko Kinetic Chronograph21 mm
- Seiko Premier Kinetic Perpetual21 mm
- Victorinox Airboss Mach 7 White21 mm
- Victorinox Airboss Mechanical Grey (21mm)21 mm
- Victorinox Alliance 3-hand Brown21 mm
- Orient Bambino V2 40.521 mm
- Orient FAC00001B021 mm
- Orient FAC00002W021 mm
- Omega Aqua Terra Worldtimer21 mm
- Omega Seamaster Planet Ocean 600M 43.5mm Black 215.30.44.21.01.00121 mm
- Omega Seamaster 300 “Spectre” LE21 mm
Questions
What does a 21 mm lug width mean?
The gap between the two lugs of the case is 21 mm, so the strap must be 21 mm wide where it meets the case.
Which brands use 21 mm lugs most?
Festina (290), Rado (202), Citizen (157), Frederique Constant (133), Seiko (115), among the references in our index.
Is the buckle width the same as the lug width?
Not always. Many straps taper toward the buckle, so a strap sold as 21-19 is 21 mm at the lugs and narrower at the buckle. Only the lug width has to match your watch.
How common is 21 mm?
It ranks number 4 of 16 lug widths in our index, with 8% of watch references.
Check before you buy
What is lug width?
The gap between the two lugs that hold the strap, in millimetres. A new strap must match it exactly: 20 mm lugs take a 20 mm strap.
Measure it in 30 seconds
- Take the strap off, or look at the back of it: many straps print their width.
- Measure the inside gap between the lugs with a caliper or a millimetre ruler.
- Round to the nearest whole millimetre. Most watches use 18, 20 or 22 mm.
Strap, quick release or system?
Most watches use spring bars, so any strap of the right width fits. Many smartwatches use their own band system instead, such as Apple Watch bands or Garmin QuickFit.