It's just 5mm thin. The case of Rado's True Square Thinline is incredibly thin. This is made possible by the material ceramic. In other words, this model is a watch that could only be made by Rado, which makes full use of ceramics. Martin Green, a contributor to the US edition of WatchTime, explains the appeal of this watch.

The model closest to the essence of Rado
It's difficult to embody the essence of a brand in a single watch. Rado is no exception. The company's worldview is wide-ranging, from diver's watches to elegant skeleton watches. However, the True Square Thinline is perhaps one of the models that comes closest to embodying the essence of the Rado brand.

Quartz (Cal. R420). 13 jewels. High-tech ceramic and Ti case (43.3mm x 37mm, 5mm thick). Water resistant to 3 ATM. Price: 303,000 yen (tax included).
Ceramics, the material at the heart of the brand
First of all, the black ceramic case and bracelet are noteworthy. While many brands are now using this material, Rado was a pioneer in this field and is one of the few to position ceramic as a core element of its brand.
Ceramic has two main properties. First, it is extremely hard, durable, and scratch-resistant. This means that Rado watches retain their luster for many years and are hardly affected by the wear and tear of everyday use. Second, it is hypoallergenic and adapts quickly to body temperature. It is also very lightweight, which is another reason why it is so comfortable to wear.
The "Rado style" is also present in the design
These characteristics are fully utilized in the True Square Thinline, but it is important to note that it is "Rado style." Rado's designs are distinct from other brands, and this is the source of its individuality.

As the model name suggests, this model features a square case, but the corners are rounded, making it feel soft in the hand. The 37mm diameter is an excellent balance, neither too much nor too little, making it suitable for a wide range of users.
The bracelet is one piece, with polished links for a smooth feel, and the overall weight is less than 87g, so light you'll forget you're wearing it.
A modern finish and a great balance of visibility

The sun-brushed black dial harmonizes with the ceramic case and bracelet, creating a unified look. The indexes are simple black bars, but the contrast with the dial makes them highly legible. The hands and Rado logo are finished in vivid orange lacquer, adding a contemporary touch.
Selection of movement to achieve thinness
The watch is powered by the quartz movement Cal. R420, which allows for an extremely thin case and makes it easy to wear.
Experience the essence of the brand at your fingertips
The lightness and comfort of the ceramic means you might forget you're wearing a watch, but the True Square Thinline's presence and distinctive Rado character catches your eye, reminding you that you're holding the very essence of the brand.



