how big is this watch, i.e. how many millimeters?

52mm diameter Case Thickness 17 millimeters

I know the dimensions, but does it appear "too big" for an 11-year old boy's wrist? He's athletic and we want to get him a watch for his birthday.

The G7900, while fairly large, has wings under the strap that make it fit nicely on smaller wrists. This means that it will likely fit better on a smaller wrist than similarly-sized G-Shocks that don't have the wings under the strap.I bought a G7900A-4 for my nephew recently. I was so impressed with the styling and the bright red color that I ended up buying another one for myself. Of all the watches I have -- and I have more than I need -- this one attracts the most attention. People who don't even notice my other watches definitely notice this one. The bright red color is hard to ignore.I think an 11-year old would be thrilled to get this watch, and will likely be the envy of his friends.

is there a smaller size?

We at us legend inc would like to thank you for your email.We believe the Casio g shock G7900 series comes one size only (large)We would like to thank you for shopping on Amazon.Us legend inc customer service

Is this a legit casio g-shock? or is it like a replica? i gotta make sure i'm not buying the replica one, i don't want to make that mistake again.

There are certain specific markings on a watch manufactured by Casio. However to be one hundred percent sure that you did purchase a Casio product you would have to mail it in to Casio’s factory service center in order to confirm that the watch was manufactured by Casio.

Mens G7900a 4 G Shock Rescue Red Digital Sport Watch

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Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔥 Rescue Red Ready: Time to Own Every Moment ⏱️

GLOBAL TIME MASTERY - World Time across 29 zones keeps you synced wherever you go.
UNBREAKABLE BOLDNESS - Shock-resistant design built to survive your toughest days.
NIGHT READY VISIBILITY - Auto EL backlight with afterglow ensures clarity in any light.
EXTREME ENVIRONMENT PROOF - Low-temp LCD (-20°C) and 200m water resistance for fearless exploration.
PRECISION TIMING POWERHOUSE - Dual chronographs with 1/100 second accuracy for exact performance tracking.

The Men's G7900A-4 G-Shock Rescue Red Digital Sport Watch by Casio is a rugged, shock-resistant timepiece engineered for professionals and adventurers alike. Featuring a 50mm resin case, mineral dial window, and a vibrant red resin strap, it offers advanced functions including moon and tide graphs, world time across 29 zones, five alarms, countdown timer, and dual 1/100 second chronographs. Its low-temperature resistant LCD and 200-meter water resistance make it ideal for marine activities and extreme conditions, while the auto EL backlight ensures visibility anytime. Powered by reliable Japanese quartz movement, this watch blends bold style with uncompromising durability.

Specifications

ASIN	B00284ADEE
ASIN	B00284ADEE
Additional Features	Alarm, Chronograph, Shock Resistant
Age Range Description	Adult
Band Color	Red
Band Material Type	Resin
Band Width	28.3 Millimeters
Bands	1
Batteries	1 Lithium Metal batteries required. (included)
Best Sellers Rank	#280,537 in Clothing, Shoes & Jewelry ( See Top 100 in Clothing, Shoes & Jewelry ) #1,178 in Men's Wrist Watches
Brand Name	Casio
Case Diameter	50 Millimeters
Case Material Type	Resin
Case Thickness	17.7 Millimeters
Clasp Type	Buckle
Closure Type	Buckle
Crystal	mineral
Customer Reviews	4.8 4.8 out of 5 stars (2,754)
Date First Available	October 21, 2009
Department	Watches
Dial Color	Red
Display	Digital
Embellishment Feature	Crystal
Face Style	Digital
Global Trade Identification Number	00079767434205
Included Components	Wristwatches
Is Discontinued By Manufacturer	No
Item Part Number	G7900A-4
Item Type Name	Watch
Item Weight	44 Grams
Item model number	G7900A-4
Manufacturer	Casio
Manufacturer	Casio
Manufacturer Part Number	G7900A-4
Model Name	G7900A-4
Model Number	G7900A-4
Power Source	Battery Powered
Product Dimensions	1 x 1 x 1 inches; 1.55 ounces
Series Number	7900
Shape	Round
Sport Type	Multi-Sport, Snowboarding
Strap Type	Two Piece Strap
Style Name	Sport
Theme	Nautical
UPC	079767434205
Unit Count	1 Count
Warranty Type	No Warranty
Watch Movement Type	Quartz
Water Resistance Depth	660 Feet
Water Resistance Level	Water Resistant

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