No, your iPhone 17 Pro Max case won't fit the Galaxy S23 Ultra
The iPhone 17 Pro Max (163.4×78mm) and Galaxy S23 Ultra (163.4×78.1mm) differ too much for cases to be compatible.
Does a iPhone 17 Pro Max Case Fit Galaxy S23 Ultra?
Last verified: March 2026
No, a iPhone 17 Pro Max case will not fit the Galaxy S23 Ultra. The phones have different dimensions that make cases incompatible.
Your iPhone 17 Pro Max case will NOT fit the Galaxy S23 Ultra. Here's why:
- •Body dimensions are nearly identical, but the camera cutout is incompatible (horizontal-bar vs vertical-quad)
| Spec | iPhone 17 Pro Max | Galaxy S23 Ultra | Diff |
|---|---|---|---|
| Height | 163.4mm | 163.4mm | Same |
| Width | 78mm | 78.1mm | Galaxy S23 Ultra +0.1mm |
| Thickness | 8.75mm | 8.9mm | Galaxy S23 Ultra +0.2mm |
| Camera Layout | horizontal-bar | vertical-quad | Different |
| Port | usb-c | usb-c | Same |
Button & Port Alignment
- •Old phone has Camera Control button — new phone case has no cutout for it
- •New phone has S Pen slot — old case has no opening for it
Since your iPhone 17 Pro Max case won't work with the Galaxy S23 Ultra, here are the highest-rated cases that will:
OtterBox
OtterBox Defender Series for Galaxy S23 Ultra
$64.95
TORRAS
TORRAS MarsClimber for Galaxy S23 Ultra
$19.99
Caseology
Caseology Nano Pop for Galaxy S23 Ultra
$15.99
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Size Comparison
Wireless Charging & MagSafe
Wireless chargers work with both phones, but magnetic snap varies.
- Your MagSafe charger will charge the Galaxy S23 Ultra via Qi, but it won't magnetically snap on.
- Only the iPhone 17 Pro Max has built-in magnets for MagSafe accessories. The Galaxy S23 Ultra needs a magnetic case or ring adapter.
iPhone 17 Pro Max
MagSafe Gen 2
25W max
Galaxy S23 Ultra
Qi only
15W max
MagSafe cases are NOT cross-compatible between these devices — the case body is shaped to each phone, even though the internal magnet ring may be the same.
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Frequently Asked Questions
Are iPhone 17 Pro Max and Galaxy S23 Ultra the same size?
iPhone 17 Pro Max measures 163.4×78×8.75mm while Galaxy S23 Ultra measures 163.4×78.1×8.9mm. They are different sizes.
Can I use a iPhone 17 Pro Max screen protector on Galaxy S23 Ultra?
Edge types differ (flat vs curved) — screen protector won't adhere properly.
What's different between iPhone 17 Pro Max and Galaxy S23 Ultra dimensions?
The height differs by 0.0mm, the width by 0.1mm, and thickness by 0.2mm. The camera module layout is also different.
Do I need a new case for Galaxy S23 Ultra?
Yes, you'll need a new case. The Galaxy S23 Ultra has different dimensions than the iPhone 17 Pro Max, so cases are not interchangeable.
Will iPhone 17 Pro Max accessories work with Galaxy S23 Ultra?
Chargers and cables are compatible since both phones use the same usb-c port. Both support wireless charging, so wireless chargers work with either phone. Cases and screen protectors depend on exact dimensions — check our compatibility results above.
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