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21mm Watch Straps

21mm is an uncommon but important lug width, found on specific Omega, IWC, and vintage sport watch models. Our 21mm collection is one of the most comprehensive available online — featuring premium leather, rubber, and fabric options from the brands that matter, all cut to the exact 21mm width you need.

⬅ 20mm Watch Straps 22mm Watch Straps ⮕
302 Products
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Strap colour

Material

Strap width (watch end)

Strap width (buckle end)

Length

Buckle option

Quick Release

Brand

Product type

Best Seller
4.76
Hirsch DUKE Black Quick-Release Alligator Embossed Leather Watch Strap
Hamilton Khaki Field Watch fitted with Hirsch Duke black leather strap worn on wrist
Hirsch
Hirsch DUKE Black Quick-Release Alligator Embossed Leather Watch Strap
£39.95 - £88.45
4.92
Nylon Watch Strap in BLACK / GREY Stripes with Polished Buckle & Keepers
Black and Grey Nato Watch
WatchObsession
Nylon Watch Strap in BLACK / GREY Stripes with Polished Buckle & Keepers
£10.95
4.56
Nylon Watch Strap in BLACK with PVD Buckle and Keepers
Nylon Watch Strap in BLACK with PVD Buckle and Keepers
WatchObsession
Nylon Watch Strap in BLACK with PVD Buckle and Keepers
£11.95
4.88
Nylon Watch Strap in BLACK with Polished Buckle and Keepers
Nylon Watch Strap in BLACK with Polished Buckle and Keepers
WatchObsession
Nylon Watch Strap in BLACK with Polished Buckle and Keepers
£10.95
4.93
Hirsch DUKE Quick-Release Alligator Embossed Leather Watch Strap in BROWN
Hirsch DUKE Quick-Release Alligator Embossed Leather Watch Strap in BROWN
Hirsch
Hirsch DUKE Quick-Release Alligator Embossed Leather Watch Strap in BROWN
£39.95 - £88.45
4.21
Hirsch OSIRIS Quick-Release Calf Leather Watch Strap in BLACK
quick release leather watch strap
Hirsch
Hirsch OSIRIS Quick-Release Calf Leather Watch Strap in BLACK
£33.95 - £82.45
Nylon Watch Strap in GREY with Polished Buckle and Keepers
Nylon Watch Strap in GREY with Polished Buckle and Keepers
WatchObsession
Nylon Watch Strap in GREY with Polished Buckle and Keepers
£10.95
5.0
Nylon Watch Strap in BLUE with Polished Buckle and Keepers
Nylon Watch Strap in BLUE with Polished Buckle and Keepers
WatchObsession
Nylon Watch Strap in BLUE with Polished Buckle and Keepers
£10.95
Best Seller
4.27
JPM Italian Vintage Leather Watch Strap in DISTRESSED BROWN
distressed brown leather watch strap
JPM Straps
JPM Italian Vintage Leather Watch Strap in DISTRESSED BROWN
£89.50 - £91.50
Best Seller
4.93
Nylon Watch Strap in PALE BLUE / ORANGE Motorsport Stripes with Polished Buckle & Keepers
Nylon Watch Strap in PALE BLUE / ORANGE Motorsport Stripes with Polished Buckle & Keepers
WatchObsession
Nylon Watch Strap in PALE BLUE / ORANGE Motorsport Stripes with Polished Buckle & Keepers
£10.95
5.0
Nylon Watch Strap in GREEN with Polished Buckle and Keepers
Nylon Watch Strap in GREEN with Polished Buckle and Keepers
WatchObsession
Nylon Watch Strap in GREEN with Polished Buckle and Keepers
£10.95
4.5
Hirsch RANGER Retro Leather Parallel Watch Strap in GOLD BROWN
Hirsch RANGER Retro Leather Parallel Watch Strap in GOLD BROWN
Hirsch
Hirsch RANGER Retro Leather Parallel Watch Strap in GOLD BROWN
£33.95 - £82.45
4.67
Hirsch RANGER Retro Leather Parallel Watch Strap in BROWN
Hirsch RANGER Retro Leather Parallel Watch Strap in BROWN
Hirsch
Hirsch RANGER Retro Leather Parallel Watch Strap in BROWN
£33.95 - £82.45
5.0
JPM Italian Vintage Leather Watch Strap in BLACK
JPM Italian Vintage Leather Watch Strap in BLACK
JPM Straps
JPM Italian Vintage Leather Watch Strap in BLACK
£89.50
5.0
Hirsch JAMES Calf Leather Performance Watch Strap in GOLD BROWN
Hirsch JAMES Calf Leather Performance Watch Strap in GOLD BROWN
Hirsch
Hirsch JAMES Calf Leather Performance Watch Strap in GOLD BROWN
£84.95 - £133.45
4.29
Hirsch JAMES Calf Leather Performance Watch Strap in BLACK
Hirsch JAMES Calf Leather Performance Watch Strap in BLACK
Hirsch
Hirsch JAMES Calf Leather Performance Watch Strap in BLACK
£84.95 - £133.45
5.0
Hirsch ROBBY Sailcloth Effect Performance Watch Strap in BLACK / RED
Hirsch ROBBY Sailcloth Effect Performance Watch Strap in BLACK / RED
Hirsch
Hirsch ROBBY Sailcloth Effect Performance Watch Strap in BLACK / RED
£84.95 - £133.45
Out of Stock
5.0
IWC-Style Alligator Embossed Leather Watch Strap in BLACK
IWC-Style Alligator Embossed Leather Watch Strap in BLACK
OEM Watch Straps
IWC-Style Alligator Embossed Leather Watch Strap in BLACK
£32.95 - £60.45
What Size Watch Strap Should I Get?

What Size Watch Strap Should I Get?

August 26, 2021
To determine which size watch strap you should get, you need to measure the strap length and lug width on your watch. Find out how here - and get the perfect fitting strap for your favourite timepiece. 
Read More
Can I Change a Watch Strap?

Can I Change a Watch Strap?

September 15, 2022
Ever wondered if it was possible to change a strap on one of your watches? Read this article to find out if and how to change your watch strap today.
Read More
How Tight Should a Watch Strap Be?

How Tight Should a Watch Strap Be?

October 14, 2021
There is no universal answer to how tight a watch strap should be as it all comes down to personal preference. That being said, your watch should be comfortable and secure, and a strap that is too tight (or too loose) isn't. Find out how to get the perfect fit here.
Read More