CASIO Watch’s 50th anniversary by bringing back the very first ring watch. A whole new style of digital watch — both practical and playful — thanks to a miniature module and advanced metalworking technology.

One of the most impressive features of the CASIO Digital Ring Watch is its engineering. It’s built on the foundations of miniaturisation and precision metal moulding, showcasing a commitment to pushing the boundaries of what’s possible in timepiece design.

Crafted entirely from metal, this ring beautifully captures the intricate details of a classic CASIO watch, all at a fraction of the size. The module powering the ring is roughly one-tenth the size of a standard wristwatch mechanism, demonstrating exceptional advances in miniaturisation. This tiny marvel still provides the full functionality of a digital watch, including three functional buttons and a 7-segment LCD display & also the date, dual time, and stopwatch functionality..

Creating a ring-sized, full-metal version of the CASIO watch’s complex form is no easy feat. To make this possible, Casio needed to use a special method of metal processing to inject a mixture of fine metal powders and resin into a mold. Using metal injection molding (MIM), the case, case back, and ring are molded in one piece, with even the dimpled design on the band faithfully reproduced. A special glass adhesive technique ensures a tight seal for a watch built to be water-resistant while still allowing the battery to be replaced.

With an inner diameter of 20 mm and a circumference of 62.8 mm, the ring fits a size 22 finger (US 10.5, EU U) and includes two size-adjusting spacers, in size 19 (19-mm inner diameter) and 16 (18-mm inner diameter).

Preset the time of your choice, and the ring watch gives off a subtle, flashing light — not only handy for keeping time, but also a poetic nod to the fleeting twinkle of time.

25.2 × 19.5 × 6.2 mm
16 g
Stainless steel bezel
Water Resistant
Approx. battery life: 2 years on SR621SW
Mineral Glass
The ring has an inner diameter of 20 mm and a circumference of 62.8 mm, fitting a size 22 finger (US 10.5, EU U).
Two size-adjusting spacers in size 19 (19-mm inner diameter) and 16 (18-mm inner diameter) are included.
World time
Dual time
Stopwatch
Alarm/hourly time signal
LED white backlight
Calendar
Accuracy: ±30 seconds per month
12/24-hour format
Strict limit 1 per customer
No discounts on this product
Multiple orders will be rejected
USG reserves the right to cancel any order deemed necessary