casio g shock gma s2100

Casio G-Shock GMA-S2100 Mini CasiOak Review

Today I’m diving into the Casio G-Shock GMA-S2100, affectionately dubbed the Mini CasiOak. Is it perfect for smaller wrists? Does it suit men and women? Is it worth your money? In this review, I’ll explore its design, features, wearing experience, and weigh the pros and cons to help you decide. Let’s get started!


G-Shock Legacy & Mini CasiOak Overview

Since 1983, G-Shock has redefined durability with watches like Kikuo Ibe’s DW-5000C, built to survive a 10-meter drop. Known for ruggedness and affordability, G-Shocks suit everyone—military personnel, celebrities, firefighters, athletes, and everyday folks.

Kikuo Ibe
Kikuo Ibe: Inventor of G-Shock
Source: Casio UK
Casio DW5000c
First ever G-Shock: Casio DW5000c
Source: Casio UK

Introduced in 2019, the GA-2100 series became a bestseller with its octagonal bezel and bold hour markers, earning the nickname CasiOak for its resemblance to the luxury Audemars Piguet Royal Oak.

3 CasiOak GA-2100
Released in 2019, the GA-2100 series became Casio’s BESTSELLER
Audemars Piguet Royal Oak
Audemars Piguet Royal Oak

The GMA-S2100, a compact version, caters to smaller wrists, making it a hit for women seeking a tough, non-Baby-G option. Its unisex design—available in white, black, and steel variants—also appeals to men.

GMA-S2100 a.k.a Mini CasiOak
GMA-S2100 = compact version of the more famous GA-2100

Key Takeaways:

  • G-Shock: Durable, affordable, and iconic since 1983
  • Mini CasiOak: Compact, unisex, perfect for smaller wrists

Design & Specs of the GMA-S2100

The unboxing of the GMA-S2100 is thrilling! Housed in a classic G-Shock tin, my white model felt lightweight at 41 grams, thanks to the Carbon Core Guard Structure. With a 46.2mm lug-to-lug, 42.9mm case, and 11.2mm thickness, it fits my 150mm wrist perfectly—finally, a G-Shock that’s snug and comfy!

Casio G-Shock GMA-S2100 Wristshot
Casio G-Shock GMA-S2100 on my 150mm wrist

The ana-digi display blends analog hands (hours, minutes) with a digital screen (seconds, date, etc.), ideal for traditional watch lovers dipping into G-Shock. The octagonal bezel, a nod to the Royal Oak, steals the show. Metallic hour indices add a striking 3D effect, elevating it from the GA-2100’s subtler design.

Closed up shot of GMA-S2100
I love the ana-digi display which blends analog hands (hours, minutes) with a digital screen (seconds, date, etc.)

Available in black, salmon, pink, and white, I chose white for a fresh, unisex vibe—my husband could borrow it too! Resin models are affordable and durable, while partly steel options like the GMS2100B-8A suit men’s wrists.

Specs at a Glance:

  • Weight: 41 grams
  • Dimensions: 46.2mm lug-to-lug, 42.9mm case, 11.2mm thick
  • Display: Analog-digital hybrid
  • Materials: Resin strap and case, some steel variants

Key Features & How to Set the Mini CasiOak

Let’s unpack the features and setup:

  • Mode Button: Press to cycle through local time, world time, stopwatch, timer, and alarm.
  • Adjust Button: Press to view city time; hold 2 seconds to enter setting mode.
  • World Time: Covers 48 cities across 31 zones—scroll with upper/lower right buttons.
  • Setting Mode: Tweak time, date, year, or toggle Daylight Saving Time (DST) and Hand Shift (HND).
  • Hand Shift: Press mode and light buttons together; hands move to clear the digital screen.
  • Bottom Right Button: Toggles date and time on the display.
  • Light Button: Activates Double LED for analog and digital visibility (1 or 3 seconds).

Additional perks include 200-meter water resistance, a 3-year battery, stopwatch, and alarms. The lume glows briefly but fades fast, so the LED is a lifesaver. The digital screen’s small size may require squinting—YouTube tutorials help master the buttons!

Here is my video for ease of learning:

Feature Highlights:

  • 200m water resistance
  • 3-year battery life
  • Double LED illumination
Wearing GMA-S2100
Sported the watch during my Bali trip. Yes I’m eating one of my favourite instant noodles 🙂

Wearing Experience: Style Meets Practicality

As a new mom, I’ve grown to love the Mini CasiOak. Its ana-digi display blends my analog preference with quartz convenience—no winding or frequent adjustments needed. At 41 grams, it’s my daily go-to, surviving baby handling and scratches flawlessly—a true beater watch.

GMA-S2100, a.k.a Mini Casioak

The octagonal bezel adds bold style, while the fit outshines chunkier G-Shocks like the DW5600. Its affordability tempts me to collect more variants, revealing why G-Shock fans are so passionate!

Why I Love It:

  • Lightweight and comfy for small wrists
  • Durable for busy, rugged days
  • Stylish and practical

Pros, Cons, and Value

Pros

  • Affordable: Around $100, some variants as low as $80
  • Stylish Design: Octagonal bezel and ana-digi display
  • Unisex: Suits men and women, especially smaller wrists
  • Variety: Resin, partly steel, and full steel options

Cons

Value Verdict

For under $100, the Mini CasiOak delivers durability, style, and features. It’s a fantastic addition to any collection, perfect for casual wear over suits. A steal for watch lovers!


Final Thoughts on the Casio G-Shock GMA-S2100

The Mini CasiOak is a unisex standout—tough, stylish, and budget-friendly. It’s ideal for smaller wrists and a fun, practical pick for daily wear.

Grab it via my affiliate links below. Prices start around $80 (at the time of writing this) —check for discounts.

Read another Casio watch review here and explore my watch-inspired merch at ashleytee.com/store.

What’s your favorite everyday watch? Would you rock this one? Comment below!

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