Every reference with a known width takes the same strap size. Your reference is engraved on the case back or between the lugs at 6 o'clock.
22 mm
Verification: From our database, not yet verified
39.5 mm case
Indicative information. Check your watch before buying a strap: whatsmylugwidth.com is not responsible for an incorrect size.
The Formex Reef 39.5 takes a 22 mm strap: all 8 references with a listed width in our database use 22 mm. Check the reference on your case back to be sure.
Formex Reef 39.5 references in our database. Each card says where its width comes from: listed by the maker (linked to the maker's page in the details), two independent sources agree, or listed in our database and not yet verified by us.
Reef 39.5 Bahama Blue
Lug width: 22 mm
Source: DatabaseCase size: 39.5 mmBahama Blue dialCase material: Stainless steel
Reef 39.5 Blue
Lug width: 22 mm
Source: DatabaseCase size: 39.5 mmBlue dialCase material: Stainless steel
Reef 39.5 Blue Coral Ocarat Edition
Lug width: 22 mm
Source: DatabaseCase size: 39.5 mmBlue fossilized coral dialCase material: Stainless steel
Reef 39.5 Forged Carbon
Lug width: 22 mm
Source: DatabaseCase size: 39.5 mmForged Carbon dialCase material: Stainless steel
Reef 39.5 Green
Lug width: 22 mm
Source: DatabaseCase size: 39.5 mmGreen dialCase material: Stainless steel
Reef 39.5 Radiant Bronze
Lug width: 22 mm
Source: DatabaseCase size: 39.5 mmRadiant Bronze dialCase material: Stainless steel
Reef 39.5 Silver
Lug width: 22 mm
Source: DatabaseCase size: 39.5 mmSilver dialCase material: Stainless steel
Reef 39.5 White
Lug width: 22 mm
Source: DatabaseCase size: 39.5 mmWhite dialCase material: Stainless steel
No reference matches.
The Formex Reef 39.5 takes a 22 mm strap: all 8 references with a listed width in our database use 22 mm. Check the reference on your case back to be sure. These widths come from our database and are not yet verified.
From our database, which lists 8 Formex Reef 39.5 references, 8 of them with a listed width. Each reference card says whether the maker lists the width, two independent sources agree on it, or it is not yet verified.
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.
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.