Galaxy S25 Ultra could beat iPhone 17 Slim to the punch with thin, light design

A leaked render of the Samsung Galaxy S25 Ultra
(Image credit: Ice Universe on X)

The drive to have the thinnest and lightest handset on the market has seemingly been a driving force for major phone manufacturers like Samsung and Apple. 

A new leak from regular tipster Ice Universe claims that the Samsung Galaxy S25 Ultra "will be the thinnest and lightest of all Ultra flagship phones." They added that this includes the recently released Google Pixel 9 Pro XL and the upcoming iPhone 16 Pro Max (h/t to Tech Radar).

The leak maven did not provide specific details on how light or thin the Galaxy S25 Ultra might be, but they have posted renders and previously talked about how the Samsung flagship phone's thin stature.

Here's the initial problem: we can't compare the S25 Ultra and its alleged thinness with the much-rumored iPhone 17 Slim, as there haven't been any dimensional specs released. 

Potentially, the iPhone 17 Slim might be as thin as the 2024 iPad Air (6.1mm thick) or even the super-thin 2024 iPad Pro (5.3mm). Could Samsung shave two to four millimeters off the Galaxy S24 Ultra to make a super thin phone? That is a big ask when most iterative changes are in the .1 to .5mm range.

However, we can compare currently released generations to see where the S25 Ultra might go. Since our only new flagship is the Pixel 9 Pro XL, we can compare it to the already-released Samsung Galaxy S24 Ultra — the S24 Ultra measures 8.6mm thick and 233 grams. The new Pixel 9 Pro XL is just barely thinner and lighter at 8.5mm and 221 grams. 

To go back a generation, the Pixel 8 Pro is thicker than the S24 Ultra at 8.8mm. The question is whether Samsung is comparing its measurements against the current Pixel 9 generation or next year's Pixel 10 series.

While the display is getting larger on the iPhone 16 Pro Max, the next Apple flagship will supposedly weigh only 225 grams but may be slightly thicker than the 8.3 mm-sized iPhone 15 Pro Max.

Alongside whatever component upgrades Samsung makes, the Korean company will need to do some serious finagling to fit everything into a smaller package. This is especially true if the new phone gets an extra large battery to power Qualcomm's next-gen Snapdragon 8 Gen 4 chipset.

Now, you may have seen Chinese phone maker Honor teasing Samsung about the thinness of their phones. It is true that Honor's phones, like the recently released Honor 200 Pro, are already thinner than Samsung's best effort, which is 7.7mm thick. The upcoming foldable Honor Magic V3 is supposed to be .36 inches when folded up, just barely larger than the Galaxy S24 Ultra.

However, with Honor being banned in the U.S. and mostly locked to the Chinese marketplace, it's easy to see Samsung ignoring its thinness efforts in a more direct attempt to compete with Google and Apple.

More from Tom's Guide

TOPICS
Scott Younker
West Coast Reporter

Scott Younker is the West Coast Reporter at Tom’s Guide. He covers all the lastest tech news. He’s been involved in tech since 2011 at various outlets and is on an ongoing hunt to build the easiest to use home media system. When not writing about the latest devices, you are more than welcome to discuss board games or disc golf with him. 

Read more
Rendered image of Galaxy S25 Slim.
New Galaxy S25 Slim renders tease Samsung's thinnest phone ever
Galaxy S25 Edge prototype next to iPhone 17 Air render
Samsung Galaxy S25 Edge vs. iPhone 17 Air: What we know so far
samsung galaxy s25 edge mockups at galaxy unpacked 2025
iPhone 17 Air and Samsung Galaxy S25 Edge could get yet another ultra-thin rival
Samsung Galaxy S25 Edge back
Samsung Galaxy S25 Edge latest leak hints at good news for pricing
Tecno Spark Slim
Forget Galaxy S25 Edge and iPhone 17 Air — this new Android phone is shockingly thin
Tecno Spark Slim display
Forget Galaxy S25 Edge — I just went hands-on with the world’s thinnest phone
Latest in Samsung Phones
Samsung Galaxy S25 Edge next to Galaxy S25 Plus
Samsung Galaxy S25 Edge vs. Galaxy S25 Plus: Everything we know so far
Showing the front of a Galaxy S25 Ultra held in hand
One UI 7 will arrive late for US Samsung users — here’s when it’ll launch for you
samsung galaxy s25 edge mockup at galaxy unpacked
Galaxy S25 Edge is overhyped — I want Samsung to make this phone thinner instead
Samsung Galaxy S23 Ultra
Older Samsung phones are finally getting One UI 7 — here's all the devices
The iPhone 16 Pro Max (L) and Samsung Galaxy S25 Ultra rear cameras
I took 200 macro photos with Samsung Galaxy S25 Ultra vs. iPhone 16 Pro — here's the winner
Try Galaxy home screen on iPhone 16 Pro Max
You can now try Samsung's latest One UI 7 software on your iPhone — here's how
Latest in News
iPhone 16 Pro vs iPhone 16 Pro Max in hand showing displays
Forget iPhone 17 — iPhone 18 could get this huge upgrade
The new Husqvarna iQ series robot lawn mower.
Husqvarna’s new robot mowers offer GPS for less
Rendered images of rumored foldable iPhone.
Foldable iPhone report just revealed key details — here's what we know
NYTimes Connections
NYT Connections today hints and answers — Saturday, March 23 (#651)
NYT Strands on a cellphone
NYT Strands today — hints, spangram and answers for game #385 (Sunday, March 23 2025)
Nintendo Switch 2
Nintendo Switch 2 rumored specs — here’s what we know so far