G-Shock GMDS5610BB-1 S Series Digital Black Resin Band

G-Shock GMDS5610BB-1: The Square, Sized Down

The G-Shock square is one of the most recognizable watch designs ever made. The GMDS5610BB-1 takes that proven formula and shrinks it to 40.5mm wide, making the iconic shape accessible to wrists that find the standard DW-5600 a bit much. Everything that matters is still here—200m water resistance, shock resistance, and that unmistakable silhouette.

The Blackout Treatment

Casio calls this the BB Series—Basic Black—and the name says it all. Matte black case, matte black band, matte black bezel. Even the button labels and “PROTECTION” text are barely visible in the same dark tone. The inverted LCD display keeps the stealth theme going. It’s a G-Shock that doesn’t announce itself, which is exactly the point.

Compact Without Compromise

At 40.5mm wide and 42 grams, this wears noticeably lighter than the standard 5600 series. The band has been resized to fit wrists from 145mm to 190mm, and at 11.9mm thick it sits flat. The bio-based resin in the case and band is Casio’s nod to sustainability—made from renewable organic resources without sacrificing the durability G-Shock is known for.

What’s Inside

The Module 3523 handles the essentials: 1/100-second stopwatch, countdown timer, multi-function alarm with flash alert, and LED Super Illuminator backlight. The auto-calendar runs through 2099, and the CR1616 battery lasts about three years. Accuracy is rated at ±15 seconds per month—standard quartz territory.

Who It’s For

If you’ve always liked the G-Shock square but found it too wide, this is the answer. The GMDS5610BB-1 keeps everything that makes the 5600 series a modern classic—the toughness, the water resistance, the clean digital layout—and delivers it in a size that works on smaller wrists without looking like you borrowed someone else’s watch.