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.

Casio Mens G7900a 4 G Shock Rescue Red Digital Sport

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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€ 204.97

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Sold byAmazon SlovakiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔥 Rescue Red Ready: Time to Own Every Second ⏱️

BUILT FOR EXTREMES - Shock-resistant & low-temp LCD (-20°C) keeps you on time no matter the challenge.
GLOBAL TIME MASTERY - World Time with 29 time zones and 48 cities—never miss a meeting or call abroad.
INTUITIVE NIGHT VISION - Auto EL backlight with afterglow ensures clear visibility in any lighting condition.
MULTI ALERT POWERHOUSE - Five alarms, flash alerts, countdown timer, and stopwatch keep your schedule sharp and on point.
MARINE GRADE DURABILITY - Water resistant up to 200m, perfect for serious surface water sports and professional marine activity.

The Casio G-Shock Rescue Red G7900A-4 is a rugged digital sport watch engineered for professionals and adventurers alike. Featuring shock resistance, a low-temperature LCD, and 200m water resistance, it delivers reliable performance in extreme conditions. With moon and tide graphs, world time across 29 zones, multiple alarms, and a precision 1/100 second stopwatch, this watch is a versatile tool for marine activities and global lifestyles. Its bold red resin case and strap combine style with durability, making it a standout accessory for the modern, active millennial.

Specifications

ASIN	B00284ADEE
ASIN	B00284ADEE
Additional Features	Alarm, Chronograph, Shock Resistant
Band Color	Red
Band Material Type	Resin
Band Width	28.3 millimeters
Bands	1
Batteries	1 Lithium Metal batteries required. (included)
Best Sellers Rank	#553,312 in Clothing, Shoes & Jewelry ( See Top 100 in Clothing, Shoes & Jewelry ) #2,461 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	4.7 4.7 out of 5 stars (2,757)
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
Item Part Number	G7900A-4
Item Type Name	Watch
Item Weight	44 g
Item model number	G7900A-4
Manufacturer	Casio
Manufacturer	Casio
Manufacturer Part Number	G7900A-4
Model Name	G7900A-4
Model Number	G7900A-4
Number of Items	1
Product Dimensions	1 x 1 x 1 inches; 1.55 ounces
Series Number	7900
Shape	Round
Sport Type	Training
Strap Type	Two Piece Strap
Style Name	Watches
Theme	Nautical
UPC	079767434205
Unit Count	1 Ounce
Warranty Type	No Warranty
Watch Movement Type	Quartz
Water Resistance Depth	660 feet
Water Resistance Level	Water Resistant

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