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Oppo A79 vs Galaxy S21 Ultra: Size & Dimensions Compared

The Oppo A79 and Galaxy S21 Ultra are nearly the same size, differing by just 0.5mm in height and 0.4mm in width.

Visual Size Overlay

Oppo A79Galaxy S21 Ultra
165.6mm165.1mm+0.5mm76mm75.6mm+0.4mm10mm
Height Δ
+0.5mm
Width Δ
+0.4mm
Thickness Δ
-0.9mm
Case CompatibilityWon't Fit
  • Body dimensions are nearly identical, but the camera cutout is incompatible (vertical-dual vs vertical-quad)
Screen ProtectorNot Compatible

Edge types differ (flat vs curved) — screen protector won't adhere properly.

DimensionOppo A79Galaxy S21 UltraDifference
Height165.6mm165.1mmGalaxy S21 Ultra -0.5mm (shorter)
Width76mm75.6mmGalaxy S21 Ultra -0.4mm (narrower)
Thickness7.99mm8.9mmGalaxy S21 Ultra +0.9mm (thicker)
Weight193g227gGalaxy S21 Ultra +34.0g (heavier)
Screen6.72"6.8"Galaxy S21 Ultra +0.1" (larger)

Visual Size Comparison

HeightOppo A79 +0.5mm
Oppo A79
165.6mm
Galaxy S21 Ultra
165.1mm
WidthOppo A79 +0.4mm
Oppo A79
76mm
Galaxy S21 Ultra
75.6mm
ThicknessGalaxy S21 Ultra +0.9mm
Oppo A79
7.99mm
Galaxy S21 Ultra
8.9mm

Button & Port Layout

Which is bigger?

The Oppo A79 and Galaxy S21 Ultra are essentially the same size.

Wireless Charging & MagSafe Compatibility

Only one phone supports wireless charging.

  • The Oppo A79 does not support wireless charging. Only the Galaxy S21 Ultra can use a wireless charger.
SpecOppo A79Galaxy S21 Ultra
Wireless ChargingNo15W
Qi VersionQi
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.

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Frequently Asked Questions

Is Oppo A79 bigger than Galaxy S21 Ultra?

Yes, the Oppo A79 is 0.5mm taller and 0.4mm wider. The Oppo A79 weighs 193g vs 227g.

Are Oppo A79 and Galaxy S21 Ultra the same size?

Very close — they differ by only 0.5mm in height and 0.4mm in width.