Longines Watch Bands: HydroConquest, Spirit and Lug Width Guide (2026)
Longines strap sizing often depends on the exact model family. HydroConquest, Spirit, Legend Diver, Heritage and Master Collection references can use different widths.
Use this page as a practical fit guide: find the model family, confirm the lug width, then choose a strap material that suits how the watch is worn. For broader material guidance, compare NATO straps, leather watch bands, stainless steel watch bands, and rubber or silicone straps.

Fast paths by strap width
Longines model compatibility table
| Model | Lug width | Model family | Recommended strap styles | Shop |
|---|---|---|---|---|
| Longines HydroConquest 44 Automatic | 22mm | HydroConquest and Conquest | Rubber, silicone, NATO, or stainless steel | Shop matching bands |
| Longines Spirit Zulu Time 42 | 22mm | Spirit and Zulu Time | Leather, rubber, NATO, or stainless steel | Shop matching bands |
| Longines Legend Diver Date | 22mm | Legend Diver | Rubber, silicone, NATO, or stainless steel | Shop matching bands |
| Longines Conquest V.H.P. 43 Bracelet | 22mm | HydroConquest and Conquest | Rubber, silicone, NATO, or stainless steel | Shop matching bands |
| Longines Legend Diver 36 | 19mm | Legend Diver | Rubber, silicone, NATO, or stainless steel | Shop matching bands |
| Longines Dolce Vita Automatic Sector | 19mm | Other model references | Leather, rubber, NATO, or stainless steel | Shop matching bands |
| Longines La Grande Classique | 16mm | La Grande Classique | Leather or stainless steel | Shop matching bands |
| Longines Spirit Automatic 37 | 19mm | Spirit and Zulu Time | Leather, rubber, NATO, or stainless steel | Shop matching bands |
| Longines Hydroconquest 39 | 19mm | HydroConquest and Conquest | Rubber, silicone, NATO, or stainless steel | Shop matching bands |
| Longines Conquest V.H.P. 43 | 22mm | HydroConquest and Conquest | Rubber, silicone, NATO, or stainless steel | Shop matching bands |
| Longines Master Collection 42 24h | 20mm | Master Collection | Leather or stainless steel | Shop matching bands |
| Longines La Grande Classique 29 | 16mm | La Grande Classique | Leather or stainless steel | Shop matching bands |
| Longines Heritage 1954 | 20mm | Heritage | Leather, rubber, NATO, or stainless steel | Shop matching bands |
| Longines Evidenza Automatic Bracelet Watch | 18mm | Other model references | Leather, rubber, NATO, or stainless steel | Shop matching bands |
| Longines HydroConquest 39 Automatic | 19mm | HydroConquest and Conquest | Rubber, silicone, NATO, or stainless steel | Shop matching bands |
| Longines Legend Diver XL | 22mm | Legend Diver | Rubber, silicone, NATO, or stainless steel | Shop matching bands |
| Longines Flagship | 20mm | Other model references | Leather, rubber, NATO, or stainless steel | Shop matching bands |
| Longines Hydroconquest Chrono | 20mm | HydroConquest and Conquest | Rubber, silicone, NATO, or stainless steel | Shop matching bands |
| Longines Heritage 1969 | 18mm | Heritage | Leather, rubber, NATO, or stainless steel | Shop matching bands |
| Longines Military Marine Nationale | 19mm | Other model references | Rubber, silicone, NATO, or stainless steel | Shop matching bands |
| Longines Conquest V.H.P. 41 | 20mm | HydroConquest and Conquest | Rubber, silicone, NATO, or stainless steel | Shop matching bands |
| Longines PrimaLuna Automatic | Measure first | Other model references | Leather, rubber, NATO, or stainless steel | Shop matching bands |
| Longines Spirit Chronograph 42 | 22mm | Spirit and Zulu Time | Leather, rubber, or stainless steel | Shop matching bands |
| Longines Hydroconquest Automatic 41 | 20mm | HydroConquest and Conquest | Rubber, silicone, NATO, or stainless steel | Shop matching bands |
| Longines La Grande Classique 33 | 18mm | La Grande Classique | Leather or stainless steel | Shop matching bands |
| Longines Avigation Big Eye | 20mm | Other model references | Leather, rubber, NATO, or stainless steel | Shop matching bands |
| Longines Legend Diver Spain Limited Edition | 22mm | Legend Diver | Rubber, silicone, NATO, or stainless steel | Shop matching bands |
| Longines Admiral GMT | 20mm | Other model references | Leather, rubber, NATO, or stainless steel | Shop matching bands |
| Longines Spirit Automatic 42 | 22mm | Spirit and Zulu Time | Leather, rubber, NATO, or stainless steel | Shop matching bands |
| Longines Dolce Vita Automatic Bracelet Watch | 19mm | Other model references | Leather, rubber, NATO, or stainless steel | Shop matching bands |
| Longines Presence Automatic 40 | 20mm | Other model references | Leather, rubber, NATO, or stainless steel | Shop matching bands |
| Longines Heritage 1918 | 20mm | Heritage | Leather, rubber, NATO, or stainless steel | Shop matching bands |
| Longines Heritage Classic Chrono | 19mm | Heritage | Leather, rubber, or stainless steel | Shop matching bands |
| Longines Conquest Heritage 40mm | 20mm | HydroConquest and Conquest | Rubber, silicone, NATO, or stainless steel | Shop matching bands |
| Longines Conquest V.H.P. Bracelet Watch | 20mm | HydroConquest and Conquest | Rubber, silicone, NATO, or stainless steel | Shop matching bands |
Best strap styles by Longines family
- HydroConquest and Conquest: Rubber, silicone, NATO, or stainless steel
- Spirit and Zulu Time: Leather, rubber, NATO, or stainless steel
- Legend Diver: Rubber, silicone, NATO, or stainless steel
- Heritage: Leather, rubber, NATO, or stainless steel
- Master Collection: Leather or stainless steel
- La Grande Classique: Leather or stainless steel
How to choose the right Longines watch band
First, identify the exact model or reference. Second, confirm the lug width in millimeters. Third, choose a strap that makes sense for the case: thinner leather for dress watches, rubber or silicone for water and sport use, NATO for casual tool-watch wear, and stainless steel when you want a heavier bracelet feel.

FAQ: Longines watch band sizing
What size band does my Longines watch need?
Match the replacement strap to the lug width of the exact Longines model. Use the model table above, or measure the inside distance between the lugs in millimeters.
Can I use any strap if the lug width matches?
For standard-lug Longines watches, yes. The strap width must match the lug width. Integrated bracelets, curved end links, and unusual cases may need model-specific parts.
What material is best for a Longines replacement band?
Leather is best for dress use, rubber or silicone is best for water and sport, NATO works well for casual and tool-watch use, and stainless steel gives the heaviest bracelet feel.
How do I confirm lug width?
Measure the inside distance between the two lugs with a ruler or caliper. A 20mm measurement needs a 20mm strap, and a 22mm measurement needs a 22mm strap.
Why do some Longines models have different strap sizes?
Case generation, case diameter, integrated bracelet design, and model family can all change the lug width. Always check the specific reference instead of assuming by brand alone.