No, your Galaxy S21 case won't fit the Galaxy Z Fold 3
The Galaxy S21 (151.7×71.2mm) and Galaxy Z Fold 3 (158.2×67.1mm) differ too much for cases to be compatible.
Does a Galaxy S21 Case Fit Galaxy Z Fold 3?
Last verified: March 2026
No, a Galaxy S21 case will not fit the Galaxy Z Fold 3. The phones have different dimensions that make cases incompatible.
Your Galaxy S21 case will NOT fit the Galaxy Z Fold 3. Here's why:
- •Height differs by 6.5mm — case won't fit
- •Width differs by 4.1mm — case won't fit
- •8.1mm thicker — case won't close properly
- •Camera bump size differs significantly
- •Camera bump protrusion differs by 2.0mm — case lip may not protect camera
- •Different edge profiles (flat vs rounded) — case shell shape won't match
- •Corner shape differs — case won't seat properly
| Spec | Galaxy S21 | Galaxy Z Fold 3 | Diff |
|---|---|---|---|
| Height | 151.7mm | 158.2mm | Galaxy Z Fold 3 +6.5mm |
| Width | 71.2mm | 67.1mm | Galaxy S21 +4.1mm |
| Thickness | 7.9mm | 16mm | Galaxy Z Fold 3 +8.1mm |
| Camera Layout | vertical-triple | vertical-triple | Same |
| Port | usb-c | usb-c | Same |
Your Galaxy S21 case won't fit the Galaxy Z Fold 3. Find the right case:
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Size Comparison
Wireless Charging & MagSafe
Wireless chargers work with both phones, but magnetic snap varies.
- Both devices support wireless charging. Standard Qi/Qi2 chargers work with either phone.
Galaxy S21
Qi only
15W max
Galaxy Z Fold 3
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 Galaxy S21 and Galaxy Z Fold 3 the same size?
Galaxy S21 measures 151.7×71.2×7.9mm while Galaxy Z Fold 3 measures 158.2×67.1×16mm. They are different sizes.
Can I use a Galaxy S21 screen protector on Galaxy Z Fold 3?
Screen sizes differ (6.2" vs 7.6") — protector won't fit.
What's different between Galaxy S21 and Galaxy Z Fold 3 dimensions?
The height differs by 6.5mm, the width by 4.1mm, and thickness by 8.1mm.
Do I need a new case for Galaxy Z Fold 3?
Yes, you'll need a new case. The Galaxy Z Fold 3 has different dimensions than the Galaxy S21, so cases are not interchangeable.
Will Galaxy S21 accessories work with Galaxy Z Fold 3?
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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