The Cartier Tank Must Blue (Ref. WSTA0055) is one of those watches that proves why Cartier designs never age. Clean lines, balanced proportions, and a dial that feels both modern and timeless. It is elegant without trying too hard, which is exactly why the strap you choose matters so much.
Whether you are wearing it daily or rotating it with other pieces, changing the strap is the easiest way to refresh the look of your Tank while keeping the watch itself protected. Below is a practical strap guide focused on sizing, fit, and the best leather strap options for this reference.
Cartier Tank Must Blue WSTA0055 Strap Size and Lug Width
Before choosing a strap, sizing is key.
The Cartier Tank Must Blue WSTA0055 has the following dimensions:
- Case size: 33.7 mm x 25.5 mm
- Case thickness: approx. 6.6 mm
- Lug width: 19 mm
This means you need a 19 mm leather strap for a proper fit. Choosing the correct lug width ensures the strap sits flush against the case, maintains the elegant Tank proportions, and avoids unwanted gaps or movement.
Most owners also appreciate that changing straps allows them to preserve the original Cartier strap, keeping it in excellent condition while enjoying a different look day to day.
Why a Leather Strap Works So Well on the Tank
The Tank was designed as a dress watch, and leather complements its rectangular case better than almost any other material. A well-chosen leather strap:
- Enhances the slim profile of the case
- Adds comfort for daily wear
- Instantly changes the personality of the watch
- Reduces wear on the original strap
At Helvetus, the Cartier Tank collection focuses on high-quality patterned cow leather straps, designed to look refined without being overstated.
You can explore all compatible options here:
Cartier Tank Leather Strap Collection
Best Leather Strap Colors for the Cartier Tank Must Blue
Different strap colors can completely change how the blue dial feels on the wrist. Below are some of the most versatile and best-selling options for the WSTA0055.
Classic Black Leather Strap
A black leather strap is the safest and most timeless choice for the Tank Must Blue. It highlights the deep blue dial and keeps the watch formal, clean, and elegant. Ideal for business wear, evening outfits, or anyone who wants a classic Cartier look.
Black Leather Strap for Cartier Tank
Deep Blue Leather Strap
Matching a blue strap with the blue Tank dial creates a refined, cohesive look without being too bold. This option works especially well if you enjoy monochrome outfits or want something subtle yet distinctive.
Blue Leather Strap for Cartier Tank
White Leather Strap
A white leather strap gives the Tank a fresh, modern feel. It adds contrast to the blue dial and works beautifully in warmer months. This option feels lighter, more casual, and perfect for summer wear.
White Leather Strap for Cartier Tank
Green Leather Strap
Green leather adds character without overpowering the watch. It pairs surprisingly well with the blue dial and gives the Tank a more contemporary, fashion-forward edge while still staying elegant.
Green Leather Strap for Cartier Tank
Red Leather Strap
For those who want their Tank to stand out, red leather offers a bold but tasteful option. It adds personality and turns the watch into a statement piece without losing its refined roots.
Red Leather Strap for Cartier Tank
A Simple Upgrade That Changes Everything
Changing the strap on your Cartier Tank Must Blue WSTA0055 is not about altering the watch. It is about unlocking its versatility. A single watch can feel formal, casual, modern, or classic simply by switching the leather strap.
With the correct 19 mm fit and a well-chosen color, you get a new experience on the wrist while keeping your original strap safely stored.
If you are looking to explore all compatible options in one place, you can find them here:
Cartier Tank Leather Strap Collection
