Genuine Alligator Watch Band | Thunderbird | IWC Style | Ocean Blue

Length	Total Length	Long Piece	Short Piece
Standard	188mm (7.40")	114mm	74mm

Description

Thunderbird Genuine Alligator Watch Band – IWC Style

Bold Color. Iconic Shape. Built With Precision.

Crafted from full cut genuine alligator leather, the Thunderbird watch band showcases the natural elegance of large, symmetrical scales and a richly textured matte finish. The color is bold yet sophisticated, offering standout style without sacrificing versatility. Contrast stitching and clean edges complete the look, making it an ideal strap for those who appreciate sharp detailing and timeless materials.

IWC-Inspired Design With Refined Proportions

Designed in the style of IWC factory straps, this band features a slim, low-profile silhouette with minimal padding for a closer fit to the wrist. The structure is clean and tailored, offering a modern take on a classic form—perfect for watches that call for precision and understated luxury.

Soft Leather Lining for Lasting Comfort

Lined with soft leather for a breathable, smooth feel, this strap is built for all-day comfort. From its premium full cut alligator exterior to its detailed craftsmanship, the Thunderbird strap delivers an elevated look and feel—ideal for collectors or anyone ready to enhance their watch with a luxury leather upgrade.

RIOS1931 Art Manuel

High-End Hand-Finished Construction

RIOS1931 Art Manuel is the brand’s high-end wrapped strap construction, produced in approximately 172 steps. An additional leather layer, carefully finished edges, and hand-sewn loops give the strap a refined, durable construction. Many Art Manuel models also feature a traditional Saddler’s Seam.

Specifications

Due to current export restrictions, Alligator and Crocodile straps cannot be shipped outside the United States.

Material: Genuine Alligator Leather in Matte, Fullcut

Strap Length: 114x74mm

Seam: Creme-White Stitching, »Saddler's Seam (Hand Seam)«, »Art Manuel«

Thickness of Strap: Tapering from approximately 4.5mm to 3.0mm.

Technical Indication: RIOS1931 watch strap compatible with watches of the brand »IWC«

Available Lug Widths: 18mm, 20mm, and 22mm

Quick Release Option Available

This watch band can be ordered with quick release spring bars for easy, tool-free strap changes.

The quick release option does not affect fit, size, or appearance — it simply allows you to swap straps in seconds without tools.

Available as a complimentary option.

How to Measure Your Watch Band Size

Start with Your Watch’s Lug Width

The correct watch band size is determined by the lug width—the distance between the inside edges of the two lugs where the band attaches to the watch case. Measure this space in millimeters.

A watch with a 20mm lug width takes a 20mm watch band; a 22mm lug width takes a 22mm band. Measure the watch itself rather than relying on the width of an old strap, especially if you are unsure whether the existing band is the original size.

Measuring a 20mm watch band lug width between the watch lugs

How to Measure Watch Band Width

1. Use a ruler marked in millimeters.

A metric ruler is easiest because watch band sizes are measured in millimeters.

2. Measure the inside distance between the lugs.

Place the ruler across the gap where the strap attaches to the case. Measure from the inside edge of one lug to the inside edge of the opposite lug.

3. Match that measurement to the band size.

If the lug width measures 20mm, choose a 20mm watch band. If it measures 22mm, choose a 22mm band.

Using centimeters?

Convert centimeters to millimeters by moving the decimal one place to the right. For example, 2.0 cm = 20mm.

Shop Watch Bands by Size

Once you know your lug width, choose the matching watch band size below to browse compatible styles.

Common Watch Band Sizing Mistakes

Measuring the Strap Instead of the Watch

Measure the lug width on the watch case, not the width of an old strap. A previous band may be the wrong size or may have compressed over time.

Measuring the Outside of the Lugs

Use the inside-to-inside distance between the lugs. Measuring the full outside width of the case will give you the wrong band size.

Using Inches Instead of Millimeters

Watch band widths are normally listed in millimeters. Measuring directly in millimeters avoids unnecessary conversion and rounding errors.

Guessing Based on Case Size

A larger watch does not always use a wider strap. Two watches with similar case diameters can have different lug widths, so always measure the actual lug opening.

Frequently Asked Questions About Watch Band Size

What is watch lug width?

Lug width is the distance between the inside edges of the two lugs where the watch band attaches to the case. Watch band sizes are typically listed in millimeters to match this measurement.

Is Lug Width the Same as Watch Band Width?

For choosing a replacement band, the lug width is the measurement that determines the band width at the watch case. A 20mm lug opening requires a watch band that is 20mm wide where it attaches to the watch.

How do I know if I need a 20mm or 22mm watch band?

Measure the inside distance between the lugs. If the opening is 20mm, choose a 20mm band. If it is 22mm, choose a 22mm band.

What Does a 20mm Watch Band Mean?

A 20mm watch band is designed to fit a watch with a 20mm space between the inside edges of the lugs. The measurement refers to the width of the band where it attaches to the watch case.

What if my measurement falls between two sizes?

Recheck the measurement directly between the inside edges of the lugs using millimeters. Watch lug widths are usually designed around a specific standard size, so an in-between result often means the measurement needs to be taken again.

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Thunderbird Genuine Alligator Watch Band – IWC Style - Ocean Blue