IWC Portofino

The strap size depends on the reference. Yours is engraved on the case back or between the lugs at 6 o'clock.

16 to 22 mm

Verification: Listed by the maker for ref. IW4581‑11, IW458601 and 20 more

29 to 45 mm cases · 2003 to 2026

Official page: IWC

Indicative information. Check your watch before buying a strap: whatsmylugwidth.com is not responsible for an incorrect size.

Collection53 references

Illustration drawn to scale: 34 mm case, 18 mm lugs

53 IWC Portofino references

IWC Portofino 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.

IW510103

Portofino

Lug width: 22 mm
Source: Database

Case size: 45 mmWhite dial

Attachment
classic lugs

Status
Listed in our database, not yet verified
IW458103

Portofino

Lug width: 18 mm
Source: Database

Case size: 37 mmWhite dial

Attachment
classic lugs

Status
Listed in our database, not yet verified
IW2010‑01

Portofino

Lug width: 18 mm
Source: Database

Case size: 32 mmWhite dial

Attachment
classic lugs

Status
Listed in our database, not yet verified
IW3564‑05

Portofino

Lug width: 18 mm
Source: Database

Case size: 34 mmBlue / Navy dial

Attachment
classic lugs

Status
Listed in our database, not yet verified
IW3331‑07

Portofino

Lug width: 18 mm
Source: Database

Case size: 34 mmWhite dial

Attachment
classic lugs

Status
Listed in our database, not yet verified
IW3564‑02

Portofino

Lug width: 20 mm
Source: Database

Case size: 34 mmGrey dial

Attachment
classic lugs

Status
Listed in our database, not yet verified
IW4581‑11

Portofino

Lug width: 18 mm
Source: Maker

Grey dial

Attachment
classic lugs

Status
Listed by the maker
IW3564‑01

Portofino

Lug width: 18 mm
Source: Database

Case size: 34 mmGrey dial

Attachment
classic lugs

Status
Listed in our database, not yet verified
IW5151‑05

Portofino

Lug width: 22 mm
Source: Database

Case size: 45 mmGrey dial

Attachment
classic lugs

Status
Listed in our database, not yet verified
IW353321

Portofino Automatic

Lug width: 20 mm
Source: Database

Case size: 29 mmYear: 2003White Mop dialCase material: Steel

Attachment
classic lugs
Movement
Quartz
Caseback
Screw steel
Production
2003-2008

Status
Listed in our database, not yet verified
IW356504

Portofino Automatic

Lug width: 20 mm
Source: Database

Case size: 40 mmGrey dial

Attachment
classic lugs

Status
Listed in our database, not yet verified
IW356505

Portofino Automatic

Lug width: 20 mm
Source: Database

Case size: 40 mmGrey dial

Attachment
classic lugs

Status
Listed in our database, not yet verified
IW356506

Portofino Automatic

Lug width: 20 mm
Source: Database

Case size: 40 mmBlack dial

Attachment
classic lugs

Status
Listed in our database, not yet verified
IW356527

Portofino Automatic

Lug width: 20 mm
Source: Database

Case size: 40 mmWhite dial

Attachment
classic lugs

Status
Listed in our database, not yet verified
IW357411

Portofino Automatic 34

Lug width: 16 mm
Source: Maker

Status
Listed by the maker
IW357412

Portofino Automatic 34

Lug width: 16 mm
Source: Maker

Status
Listed by the maker
IW357413

Portofino Automatic 34

Lug width: 16 mm
Source: Database

Case size: 34 mmBlue dialCase material: Stainless Steel
IW357414

Portofino Automatic 34

Lug width: 16 mm
Source: Maker

Status
Listed by the maker
IW357415

Portofino Automatic 34

Lug width: 16 mm
Source: Maker

Status
Listed by the maker
IW657601

Portofino Automatic 34

Lug width: 16 mm
Source: Database
IW458601

Portofino Automatic 37

Lug width: 18 mm
Source: Maker

Grey dial

Attachment
classic lugs

Status
Listed by the maker
IW458602

Portofino Automatic 37

Lug width: 18 mm
Source: Database

Case size: 37 mmGreen dial

Attachment
classic lugs

Status
Listed in our database, not yet verified
IW458603

Portofino Automatic 37

Lug width: 18 mm
Source: Maker

Black dial

Attachment
classic lugs

Status
Listed by the maker
IW458606

Portofino Automatic 37

Lug width: 18 mm
Source: Maker

Grey dial

Attachment
classic lugs

Status
Listed by the maker
IW458610

Portofino Automatic 37

Lug width: 18 mm
Source: Maker

Grey dial

Attachment
classic lugs

Status
Listed by the maker
IW458611

Portofino Automatic 37

Lug width: 18 mm
Source: Maker

Black dial

Attachment
classic lugs

Status
Listed by the maker
IW658602

Portofino Automatic 37

Lug width: 18 mm
Source: Maker

Blue/Navy dial

Attachment
classic lugs

Status
Listed by the maker
IW658603

Portofino Automatic 37

Lug width: 18 mm
Source: Maker

Attachment
classic lugs

Status
Listed by the maker
IW459801

Portofino Automatic Day & Night 34

Lug width: 16 mm
Source: Database

Attachment
classic lugs

Status
Listed in our database, not yet verified
IW659801

Portofino Automatic Day & Night 34

Lug width: 16 mm
Source: Maker

Status
Listed by the maker
IW459004

Portofino Automatic Day Night 34 Le Petit Prince

Lug width: 16 mm
Source: Database

Case size: 34 mmYear: 2026Blue Sunrise dialCase material: Steel

Attachment
classic lugs
Style
dress
Movement
Automatic
Caseback
Solid back
Production
verified-source

Status
Listed in our database, not yet verified. Sources disagree on the lug width
IW459401

Portofino Automatic Moon Phase

Lug width: 20 mm
Source: Database

Case size: 40 mmGrey dial

Attachment
classic lugs

Status
Listed in our database, not yet verified
IW459601

Portofino Automatic Moon Phase 37

Lug width: 18 mm
Source: Maker

Grey dial

Attachment
classic lugs

Status
Listed by the maker
IW659601

Portofino Automatic Moon Phase 37

Lug width: 18 mm
Source: Maker

Grey dial

Attachment
classic lugs

Status
Listed by the maker
IW659602

Portofino Automatic Moon Phase 37

Lug width: 18 mm
Source: Maker

Grey dial

Attachment
classic lugs

Status
Listed by the maker
IW459604

Portofino Automatic Moon Phase 37 Year of the Snake

Lug width: 18 mm
Source: Maker

Attachment
classic lugs

Status
Listed by the maker
IW391025

Portofino Chronograph

Lug width: 20 mm
Source: Database

Case size: 42 mmWhite dial

Attachment
classic lugs

Status
Listed in our database, not yet verified
IW391028

Portofino Chronograph

Lug width: 20 mm
Source: Database

Case size: 42 mmGrey dial

Attachment
classic lugs

Status
Listed in our database, not yet verified
IW391029

Portofino Chronograph

Lug width: 20 mm
Source: Database

Case size: 42 mmBlack dial

Attachment
classic lugs

Status
Listed in our database, not yet verified
IW391035

Portofino Chronograph

Lug width: 20 mm
Source: Database

Case size: 42 mmBlue / Navy dial

Attachment
classic lugs

Status
Listed in our database, not yet verified
IW391404

Portofino Chronograph 39

Lug width: 20 mm
Source: Maker

Case size: 39 mmBlack dialCase material: Stainless steel

Attachment
classic lugs

Status
Listed by the maker
IW391405

Portofino Chronograph 39

Lug width: 20 mm
Source: Database

Case size: 39 mmBlack dialCase material: Stainless steel

Attachment
classic lugs

Status
Listed in our database, not yet verified
IW391406

Portofino Chronograph 39

Lug width: 20 mm
Source: Database

Case size: 39 mmBlack dialCase material: Stainless steel

Attachment
classic lugs

Status
Listed in our database, not yet verified
IW391407

Portofino Chronograph 39

Lug width: 20 mm
Source: Database

Case size: 39 mmBlack dialCase material: Stainless steel

Attachment
classic lugs

Status
Listed in our database, not yet verified
IW391503

Portofino Chronograph 39

Lug width: 20 mm
Source: Database

Case size: 39 mmGrey dial

Attachment
classic lugs

Status
Listed in our database, not yet verified
IW359001

Portofino Complete Calendar

Lug width: 20 mm
Source: Database

Case size: 41 mmGrey dial

Attachment
classic lugs

Status
Listed in our database, not yet verified
IW359002

Portofino Complete Calendar

Lug width: 20 mm
Source: Database

Case size: 41 mmGrey dial

Attachment
classic lugs

Status
Listed in our database, not yet verified
IW510107

Portofino Hand-Wound Eight Days

Lug width: 22 mm
Source: Database

Case size: 45 mmGrey dial

Attachment
classic lugs

Status
Listed in our database, not yet verified
IW516409

Portofino Hand-Wound Moon Phase

Lug width: 22 mm
Source: Database

Case size: 45 mmGrey dial

Attachment
classic lugs

Status
Listed in our database, not yet verified
IW344601

Portofino Perpetual Calendar

Lug width: 20 mm
Source: Maker

Case size: 40 mmSilver dial

Attachment
classic lugs

Status
Listed by the maker
IW344602

Portofino Perpetual Calendar

Lug width: 20 mm
Source: Maker

Case size: 40 mmSilver dialCase material: Red gold 750

Attachment
classic lugs

Status
Listed by the maker
IW359201

Portofino Pointer Date

Lug width: 18 mm
Source: Maker

Grey dial

Attachment
classic lugs

Status
Listed by the maker
IW359202

Portofino Schaffhausen Portofino Automatic Pointer Date Laureus

Lug width: 18 mm
Source: Maker

Case size: 39 mmBlue dialCase material: Stainless steel

Attachment
classic lugs

Status
Listed by the maker

FAQ

What lug width does the IWC Portofino use?

IWC Portofino lug width: 16 to 22 mm depending on the reference. The most common is 18 mm (20 of the 53 references with a listed width in our database). Find your exact reference in the table below. The IWC Portofino ref. IW357411, IW357412 and 3 more take 16 mm (listed by the maker). The IWC Portofino ref. IW4581-11, IW458601 and 12 more take 18 mm (listed by the maker). The IWC Portofino ref. IW391404, IW344601 and 1 more take 20 mm (listed by the maker).

Do all IWC Portofino references take the same strap?

No. 4 different lug widths appear across the line, often by case size or generation. Check the reference engraved on the case back or between the lugs.

Where do these IWC Portofino lug widths come from?

From our database, which lists 53 IWC Portofino references, 53 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.

Other IWC collections

Aquatimer Automatic18 or 22 mm
Aquatimer Cousteau20 or 22 mm
Aquatimer Deep22 mm
Aquatimer GST20 mm
Big Pilot21 to 26 mm
Da Vinci11.5 to 24 mm
Ingenieur Automatic20 mm
Ingenieur SLNot verified
Pilot “Petit17 or 20 mm
Pilot Chronograph18 to 22 mm
Porsche Design20 or 22 mm
Portugieser20 or 22 mm

All IWC collections

Help

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.