Unlike most rings, Casio's G-Shock Nano DWN-5600 is one-size-fits-all, thanks to its adjustable strap. Look for it in Japan ...

Casio unveils the G-SHOCK DWN-5600 “Nano Ring”, a ring-sized version of the classic DW-5600 with a functional LCD display, ...

The new G-Shock Nano DWN-5600 has launched in Japan and features an adjustable finger strap.

It's not a smart ring, it's a watch - one that packs many of the same features as traditional G-Shock watches. And those three side buttons aren't merely decorative.

Casio unveils G-Shock Nano DWN-5600, a 6g finger-sized digital watch with 200m water resistance, shock protection, dual time, and stopwatch support.