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Galaxy S23 vs Galaxy S21: Size & Dimensions Compared

The Galaxy S21 is the larger phone, measuring 5.4mm shorter and 0.3mm narrower.

Visual Size Overlay

Galaxy S23Galaxy S21
146.3mm151.7mm-5.4mm70.9mm71.2mm-0.3mm10mm
Height Δ
-5.4mm
Width Δ
-0.3mm
Thickness Δ
-0.3mm
Case CompatibilityWon't Fit
  • Height differs by 5.4mm — case won't fit
  • Thickness differs by 0.3mm — may affect fit
  • Camera bump size slightly different
Screen ProtectorMay Fit

Screen sizes are close (6.1" vs 6.2") but may not align perfectly.

DimensionGalaxy S23Galaxy S21Difference
Height146.3mm151.7mmGalaxy S21 +5.4mm (taller)
Width70.9mm71.2mmGalaxy S21 +0.3mm (wider)
Thickness7.6mm7.9mmGalaxy S21 +0.3mm (thicker)
Weight168g169gGalaxy S21 +1.0g (heavier)
Screen6.1"6.2"Galaxy S21 +0.1" (larger)

Visual Size Comparison

HeightGalaxy S21 +5.4mm
Galaxy S23
146.3mm
Galaxy S21
151.7mm
WidthGalaxy S21 +0.3mm
Galaxy S23
70.9mm
Galaxy S21
71.2mm
ThicknessGalaxy S21 +0.3mm
Galaxy S23
7.6mm
Galaxy S21
7.9mm

Button & Port Layout

Which is bigger?

The Galaxy S21 is the taller phone at 151.7mm (vs 146.3mm). It is also 1g heavier.

Wireless Charging & MagSafe Compatibility

Wireless chargers work with both phones, but magnetic snap varies.

  • Both devices support wireless charging. Standard Qi/Qi2 chargers work with either phone.
SpecGalaxy S23Galaxy S21
Wireless Charging15W15W
Qi VersionQiQi
MagSafeNoNo
Built-in MagnetsNoNo

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.

Upgrading from Galaxy S23 to Galaxy S21?

Different sizes mean your old case probably won't fit. You'll need a new one.

Accessories for Galaxy S23

Spigen

Spigen Rugged Armor for Galaxy S23

$15.99

View on Amazon

Spigen

Spigen Liquid Air for Galaxy S23

$13.99

View on Amazon

Caseology

Caseology Parallax for Galaxy S23

$16.99

View on Amazon

Accessories for Galaxy S21

As an Amazon Associate, WillItSnap earns from qualifying purchases.

Frequently Asked Questions

Is Galaxy S23 bigger than Galaxy S21?

No, the Galaxy S21 is 5.4mm taller. The Galaxy S23 weighs 168g vs 169g.

Are Galaxy S23 and Galaxy S21 the same size?

No, the height differs by 5.4mm, width by 0.3mm, and thickness by 0.3mm.