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| The Casio GMDB300-2 (pictured) with a blue shell and negative display. |
If you love the rugged durability of a G-Shock but have always wished for something a little less… chunky on your wrist, Casio has news you’ll want to hear. The newly released GMD-B300 series is now officially on sale in the United States, just days after first appearing on Casio Japan’s website. And yes – these compact little digital watches come with a built-in step tracker, making them one of the most fitness-friendly G-Shocks to date.
The series includes two clean, versatile colorways: the GMD-B300-2 in a deep navy blue, and the GMD-B300-7 in a crisp off-white. Both are listed as active on Casio’s US website, with working purchase buttons and a price tag of **113), but for a brand-new G-Shock with activity tracking, it’s still remarkably affordable.
A Genuinely Slimmer G-Shock for Smaller Wrists
Let’s talk size, because that’s the real headline here. The GMD-B300 measures just 46.4mm × 43.8mm × 12mm and weighs only 41 grams. To put that in perspective, most classic G-Shocks (like the DW5600) are noticeably thicker and heavier. Casio has also shortened the band length to better fit slimmer wrists – which explains why the off-white GMDB300-7 is listed under the brand’s Women’s category. But anyone who prefers a lighter, lower-profile digital watch will appreciate the change.
Navy option? Right this way: Casio GMD-B300-2.
Prefer the off-white? Here’s the Casio GMD-B300-7.
Step Tracking Without the Smartwatch Bloat
The biggest functional upgrade over a standard digital G-Shock is the built‑in accelerometer-based step tracker. It silently counts your steps all day, displaying both your total daily steps and your progress toward a goal you set yourself – anywhere from 1,000 to 50,000 steps, adjustable in 1,000-step increments. There’s also an hourly step graph covering the past seven hours, broken into six levels, so you can see at a glance when you’ve been most active.
All that step data syncs over Bluetooth to the Casio Watches app. The app does more than just log your daily movement – it also handles automatic time adjustment (handy for travel), stopwatch data transfer, a phone finder feature, and access to roughly 300 world time cities (the watch itself still has a dual time display onboard).
The Usual G-Shock Toughness – With a Green Twist
Beyond the step tracking, the GMD-B300 keeps everything you expect from a G-Shock digital. You get:
- Five daily alarms
- Countdown timer with interval measurement and auto-repeat
- 1/100-second stopwatch that stores up to 200 lap/split records
- Super Illuminator LED backlight with auto-light and afterglow
- Full auto‑calendar running through the year 2099
- 200 meters water resistance and full shock resistance (yes, even in that slim case)
Battery life is rated at roughly two years on a single CR2016 cell. And in a nice nod to sustainability, the case, bezel, and band use a combination of standard and bio-based resin.
How to Get One – And an Alternative on Amazon
Both the navy GMD-B300-2 and off‑white GMD-B300-7 are available right now directly from Casio’s US website at $135 each. Given how quickly some special-edition G-Shocks sell out, don’t sleep on these if you’ve been waiting for a smaller, step-counting G.
That said, if you’re looking for an even更低-cost entry point into Casio’s fitness-ready watches, there’s another option worth a click: the Casio WS-B1000-2AV on Amazon – it also packs a step tracker and Bluetooth sync, often at a lower price. But for the iconic G-Shock look in a genuinely wearable size, the new GMD-B300 series is hard to beat.
Bottom line: Casio has finally made a G-Shock that disappears on your wrist, counts your steps like a fitness band, and still survives a drop into a puddle (or a pool). At $135, it’s an easy recommendation for first-time G-Shock buyers and longtime fans alike.
