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Casio America announced the GMAS2100PR, listed on Casio’s U.S. product page as the GMAS2100PR-4A, at a U.S. price of $110. Casio said it would be available beginning October 1, 2026, through select retailers, gshock.casio.com and the G-SHOCK Soho Store. Its defining feature is a pink ribbon-shaped hand on the inset dial at 9 o’clock, set against a pastel-pink body with magenta accents.
What is the new Pink Ribbon G-SHOCK?
It is a compact, analog-digital watch in Casio’s 2100 series. Casio America’s September 30, 2026 announcement calls it GMAS2100PR; the U.S. product listing uses the full model name GMAS2100PR-4A. The watch has a soft-pink resin case and band, vivid magenta accents on the hands, indices and case markings, and special packaging for the 2026 campaign. The pink ribbon detail is a hand on the small inset dial at 9 o’clock.
For the U.S. launch identity, the Casio America announcement and U.S. campaign listing provide the clearest naming. Casio’s international campaign page has inconsistent model text in its descriptive copy, so the U.S. name is the appropriate one to use here.
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Price and US availability
Casio America announced a price of $110 and availability beginning October 1, 2026, through select retailers, gshock.casio.com and the G-SHOCK Soho Store. That is the announced U.S. price and launch timing; retailer inventory and online stock can change.
#1 Best Overall
- It is slim, lightweight, and compact in design and boasts a chic, monochromatic look
- Shock Resistant
- Carbon Core Guard structure
- Double LED light: LED light for the face & LED backlight for the digital display
Size, construction and water resistance
The watch measures 46.2 × 42.9 × 11.2 mm and weighs 41 g. It uses Casio’s Carbon Core Guard structure, a carbon/bio-based resin case and bezel, a bio-based resin band, and mineral glass. Casio rates it for 200-meter water resistance.
Functions and battery life
The GMAS2100PR-4A combines conventional hands with a digital display. Its listed functions include:
Rank #2
- Magnetic resistant, shock resistant, 200-meter water resistance, led light, world time, stopwatch, countdown timer
- 5 daily alarms, hourly time signal, full auto-calendar, 12/24-hour format, approx. Battery life: 3 years on cr1220
- Quartz Movement
- Case Diameter: 49mm
- Water resistant 200m (660ft): in general, suitable for professional marine activity and serious surface water sports, but not diving
- World time across 31 time zones, with 48 cities plus UTC
- A 1/100-second stopwatch and countdown timer
- Five daily alarms
- Hand-shift function, 12/24-hour time formats and LED lighting
It runs on two SR726W batteries. Casio lists approximately three years of battery life; actual life can vary with use.
What the Pink Ribbon campaign supports
Casio America describes this as its fourth annual Pink Ribbon special edition and says it will donate $25,000 to the Breast Cancer Research Foundation (BCRF), regardless of sales. The company says the contribution is not contingent on purchases, so buying the watch should not be described as triggering or increasing the donation.
Rank #3
- Boasting the classic G-Shock look with an urban upgrade, this women's watch features a black analog digital dial with pink, teal, purple, and lime colored accents for a multi-dimensional, high impact feel
- With the iconic Casio watch shock resistant construction and magnetic resistance, this G-Shock is in a class of its own
- Official Licensed Product
In its launch announcement, Casio said BCRF supports more than 260 investigators across 17 countries and had invested $75.75 million in scientific grants “this year.” The release also said breast cancer deaths have fallen 44 percent since BCRF was founded in 1993, attributing the progress to research. These are figures and claims made by Casio America in its announcement, not independently verified here.
Shermeen Greenmun, Casio’s vice president of Timepiece, described the company’s view of the campaign this way: “Every G-SHOCK is built to keep going, and that is what breast cancer research needs from all of us: steady, sustained support.” Casio also characterized the watch as a way to wear that commitment and said its donation would support research. Those are the company’s statements about its campaign and contribution.
Rank #4
- Casio G-Shock Alarm World Time Quartz Analog-Digital Ladies Watch GMA-P2100ST-4ADR
Who might want this model?
The watch is a fit for someone looking for a pink analog-digital G-SHOCK who values the ribbon detail and campaign design as much as the standard 2100-series look. Before choosing it over another G-SHOCK, consider the 46.2 × 42.9 mm case dimensions, whether you prefer hands plus a digital display, the color and campaign motif, and the features and battery format. Casio’s campaign page also lists earlier Pink Ribbon models, including DW5600PK, GMDS5610PK, GA-2100P, GMAS2100P and GMAS145PK; their current prices and retailer availability are not established here.
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Best Value
- Case size (L× W× H): 42.8 × 39 × 14.7 mm
- Case and bezel material: Resin
- Construction: Shock Resistant
- Power supply and battery life: Approx. battery life: 3 years on CR1616
- Weight: 34 g
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
