What are the dimensions of Galaxy S21 Ultra?

The Galaxy S21 Ultra measures 165.1×75.6×8.9mm and weighs 227g.

What are the dimensions of OnePlus 12?

The OnePlus 12 measures 164.3×75.8×9.2mm and weighs 220g.

Galaxy S21 Ultra vs OnePlus 12: Size & Dimensions Compared

Q: Are Galaxy S21 Ultra and OnePlus 12 the same size?

Yes, the Galaxy S21 Ultra and OnePlus 12 are nearly the same size with minimal dimension differences.

The Galaxy S21 Ultra and OnePlus 12 are nearly the same size, differing by just 0.8mm in height and 0.2mm in width.

Visual Size Overlay

Galaxy S21 UltraOnePlus 12

Height Δ

+0.8mm

Width Δ

-0.2mm

Thickness Δ

-0.3mm

Case CompatibilityWon't Fit

•Body dimensions are nearly identical, but the camera cutout is incompatible (vertical-quad vs circular-triple)

Screen ProtectorCompatible

Same screen size (6.82") with minimal width difference — should fit.

Dimension	Galaxy S21 Ultra	OnePlus 12	Difference
Height	165.1mm	164.3mm	OnePlus 12 -0.8mm (shorter)
Width	75.6mm	75.8mm	OnePlus 12 +0.2mm (wider)
Thickness	8.9mm	9.2mm	OnePlus 12 +0.3mm (thicker)
Weight	227g	220g	OnePlus 12 -7.0g (lighter)
Screen	6.8"	6.82"	Same

Visual Size Comparison

HeightGalaxy S21 Ultra +0.8mm

Galaxy S21 Ultra

165.1mm

OnePlus 12

164.3mm

WidthOnePlus 12 +0.2mm

Galaxy S21 Ultra

75.6mm

OnePlus 12

75.8mm

ThicknessOnePlus 12 +0.3mm

Galaxy S21 Ultra

8.9mm

OnePlus 12

9.2mm

Button & Port Layout

Which is bigger?

The Galaxy S21 Ultra and OnePlus 12 are essentially the same size.

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.

Spec	Galaxy S21 Ultra	OnePlus 12
Wireless Charging	15W	15W
Qi Version	Qi	Qi
MagSafe	No	No
Built-in Magnets	No	No

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.