Device summary

Samsung

Galaxy S23 Ultra

Apple

iPhone 18 Pro Max

Full specifications

Full specifications
Basic information
Release year20232026
Starting price—$1,299
Display size6.8-inch6.9-inch
Dimensions78.1 mm × 163.4 mm × 8.9 mm78.0 mm × 163.4 mm × 8.8 mm
Weight234 g249 g
Front materialCorning Gorilla Glass Victus 2Ceramic Shield 2
Back materialCorning Gorilla Glass Victus 2Ceramic Shield
Display
Display technologyDynamic AMOLED 2XSuper Retina XDR OLED
Resolution3088 × 14402868 × 1320
Refresh rate120 Hz120 Hz
Peak brightness1750 nits3000 nits
ProtectionCorning Gorilla Glass Victus 2Ceramic Shield 2
Performance
ChipsetSnapdragon 8 Gen 2 Mobile Platform for GalaxyApple A20 Pro
RAM8 GB, 12 GB—
Storage256 GB, 512 GB, 1024 GB256 GB, 512 GB, 1024 GB, 2048 GB
Expandable storage—No
Cameras
Main cameraWide · 200 MP · ƒ/1.7 · OISFusion Main · 48 MP · ƒ/1.48–ƒ/4.0 · 24 mm · Second-generation sensor-shift OIS
Ultra-wide cameraUltra-wide · 12 MP · ƒ/2.2Fusion Ultra Wide · 48 MP · ƒ/2.2 · 13 mm
Telephoto cameraTelephoto · 10 MP · ƒ/2.4 · 3x · OISFusion Telephoto · 48 MP · ƒ/2.8 · 100 mm · 4× optical zoom · 3D sensor-shift OIS
Rear camera 4Telephoto · 10 MP · ƒ/4.9 · 10x · OIS—
Front camerasSelfie · 12 MP · ƒ/2.2Center Stage · 18 MP · ƒ/1.9
Video recording—4K Dolby Vision up to 120 fps, ProRes up to 4K at 120 fps
Battery & charging
Wired charging45 W—
Wireless charging—25 W
Charging standardSuper Fast Charging 2.0USB-C, MagSafe up to 25W, Qi2 up to 25W
Video playback (Manufacturer claim)—45 h
Streamed video (Manufacturer claim)—40 h
Battery type—Built-in rechargeable lithium-ion
Typical capacity5000 mAh—
Rated capacity4855 mAh—
Connectivity
Cellular5G, LTE5G (sub-6 GHz and mmWave), Gigabit LTE
Wi‑FiWi-Fi 6EWi‑Fi 7 (802.11be)
BluetoothBluetooth 5.3Bluetooth 6
USBUSB Type-CUSB-C (USB 3, up to 10Gb/s)
NFCYesYes
eSIMYesYes
Satellite—Emergency SOS via satellite
Build & durability
Ingress protectionIP68IP68
Frame—Aluminum unibody

Key differences

The most meaningful measured gaps in size and weight — not an overall winner.

  • Weight

    Galaxy S23 Ultra

    15 g lighter

  • Height

    Very similar height

  • Width

    Very similar width

  • Thickness

    Very similar thickness

What these size differences mean

Calculated from the dimensions shown, rounded to 0.1 mm and 1 g. Percentages use the smaller measurement as the reference. Fold and rotation settings affect the dimensions compared.

  • Galaxy S23 Ultra is 0.1 mm (0.1% relative to iPhone 18 Pro Max) wider. Check this difference against the width of your current device and pocket opening.
  • Both have the same listed height (163.4 mm) at the displayed precision. This describes the body outline; screen diagonal alone does not tell you the overall size.
  • Galaxy S23 Ultra is 0.1 mm (1.1% relative to iPhone 18 Pro Max) thicker. Cases and camera protrusions can change the clearance you need.
  • Galaxy S23 Ultra is 15 g lighter. This is the listed device-weight difference, not a measured comfort rating.

Use these figures to compare physical size. They do not establish one-handed reach, pocket fit, durability or an overall winner.

Size in everyday life

Picture it in your front pocket.

Front pocket reference

2018 US jeans study · 20 brands · 80 pairs · Approx. 32-inch waists

Galaxy S23 Ultra

iPhone 18 Pro Max

Sources and measurement notes

Sizometry compares published specifications and calculates differences. These are not hands-on measurements or tests of comfort, performance or pocket fit.

Galaxy S23 Ultra

No source link is recorded for this model yet. Treat its listed figures as unverified.

Check the exact model, year, region and configuration on the linked page. References may cover several variants. Folded and unfolded dimensions differ; cases and camera protrusions may change the space a device needs. Drawings share a relative scale and are not calibrated to life size on your screen.

Galaxy S23 Ultra vs iPhone 18 Pro Max Size Comparison

Compare in Sizometry Tool

See both devices at the same scale.