No, your iPhone 16 Pro Max case won't fit the Galaxy S21+
The iPhone 16 Pro Max (163×77.6mm) and Galaxy S21+ (161.5×75.6mm) differ too much for cases to be compatible.
Does a iPhone 16 Pro Max Case Fit Galaxy S21+?
Last verified: March 2026
No, a iPhone 16 Pro Max case will not fit the Galaxy S21+. The phones have different dimensions that make cases incompatible.
Your iPhone 16 Pro Max case will NOT fit the Galaxy S21+. Here's why:
- •Camera module layout is different — cutout won't align
| Spec | iPhone 16 Pro Max | Galaxy S21+ | Diff |
|---|---|---|---|
| Height | 163mm | 161.5mm | iPhone 16 Pro Max +1.5mm |
| Width | 77.6mm | 75.6mm | iPhone 16 Pro Max +2.0mm |
| Thickness | 8.25mm | 7.8mm | iPhone 16 Pro Max +0.5mm |
| Camera Layout | square-triple | vertical-triple | Different |
| Port | usb-c | usb-c | Same |
Button & Port Alignment
- •Old phone has Camera Control button — new phone case has no cutout for it
Your iPhone 16 Pro Max case won't fit the Galaxy S21+. Find the right case:
As an Amazon Associate, WillItSnap earns from qualifying purchases. This doesn't affect our compatibility data.
Get alerts when we add more phones
Size Comparison
Wireless Charging & MagSafe
Wireless chargers work with both phones, but magnetic snap varies.
- Your MagSafe charger will charge the Galaxy S21+ via Qi, but it won't magnetically snap on.
- Only the iPhone 16 Pro Max has built-in magnets for MagSafe accessories. The Galaxy S21+ needs a magnetic case or ring adapter.
iPhone 16 Pro Max
MagSafe Gen 2
25W max
Galaxy S21+
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.
Related Guides
Related Compatibility Checks
Frequently Asked Questions
Are iPhone 16 Pro Max and Galaxy S21+ the same size?
iPhone 16 Pro Max measures 163×77.6×8.25mm while Galaxy S21+ measures 161.5×75.6×7.8mm. They are different sizes.
Can I use a iPhone 16 Pro Max screen protector on Galaxy S21+?
Screen sizes differ (6.9" vs 6.7") — protector won't fit.
What's different between iPhone 16 Pro Max and Galaxy S21+ dimensions?
The height differs by 1.5mm, the width by 2.0mm, and thickness by 0.5mm. The camera module layout is also different.
Do I need a new case for Galaxy S21+?
Yes, you'll need a new case. The Galaxy S21+ has different dimensions than the iPhone 16 Pro Max, so cases are not interchangeable.
Will iPhone 16 Pro Max accessories work with Galaxy S21+?
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.
Want to check another phone?
← Back to the compatibility checker