Which phone is lighter?

Galaxy S25 Ultra is lighter at 218 g versus Galaxy S23 Ultra at 234 g (16 g difference).

Which phone is thinner?

Galaxy S25 Ultra is thinner at 8.2 mm compared with Galaxy S23 Ultra at 8.9 mm (0.70 mm difference).

Which phone is easier to carry?

Galaxy S25 Ultra is easier to carry with a smaller overall body size (77.6 × 162.8 × 8.2 mm, 218 g) than Galaxy S23 Ultra (78.1 × 163.4 × 8.9 mm, 234 g).

Which phone is better for one-handed use?

Galaxy S25 Ultra is better for one-handed use with a 77.6 mm width, 162.8 mm height, and 218 g weight versus Galaxy S23 Ultra at 78.1 mm, 163.4 mm, and 234 g.

Device Size Comparison

Galaxy S23 Ultra vs Galaxy S25 Ultra

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Comparison Summary

Galaxy S23 Ultra is slightly wider than Galaxy S25 Ultra (78.1 mm vs 77.6 mm), Galaxy S23 Ultra is noticeably heavier (234 g vs 218 g), and Galaxy S23 Ultra is noticeably thicker (8.9 mm vs 8.2 mm). Galaxy S23 Ultra is 0.5 mm wider and 0.6 mm taller than Galaxy S25 Ultra, making Galaxy S23 Ultra...

Winner Cards

Smaller body

Galaxy S25 Ultra

Galaxy S25 Ultra (77.6 × 162.8 mm) vs Galaxy S23 Ultra (78.1 × 163.4 mm).

Lighter weight

Galaxy S25 Ultra

Galaxy S25 Ultra (218 g) vs Galaxy S23 Ultra (234 g), 16 g lighter.

Thinner design

Galaxy S25 Ultra

Galaxy S25 Ultra (8.2 mm) vs Galaxy S23 Ultra (8.9 mm).

Pocketability

Galaxy S25 Ultra

Galaxy S25 Ultra has a smaller overall body size for pocket carry (77.6 × 162.8 × 8.2 mm).

Larger overall size

Galaxy S23 Ultra

Galaxy S23 Ultra is 0.5 mm wider and 0.6 mm taller than Galaxy S25 Ultra (78.1 × 163.4 mm vs 77.6 × 162.8 mm).

Dimensions Table

Dimension	Galaxy S23 Ultra	Galaxy S25 Ultra	Difference
Width	78.1 mm	77.6 mm	-0.5 mm
Height	163.4 mm	162.8 mm	-0.6 mm
Thickness	8.9 mm	8.2 mm	-0.7 mm
Weight	234 g	218 g	-16 g

Real-World Feel

One-handed use feels similar on both phones because width and height are close (78.1 × 163.4 mm vs 77.6 × 162.8 mm).
Galaxy S25 Ultra slides into pockets more comfortably at 8.2 mm thick, and Galaxy S25 Ultra has the smaller overall body for vertical pocket storage.
Galaxy S25 Ultra (218 g) feels noticeably lighter during extended one-handed use than Galaxy S23 Ultra (234 g), a 16 g difference that adds up over time.
Galaxy S23 Ultra takes up more desk and bag space at 78.1 × 163.4 × 8.9 mm, while Galaxy S25 Ultra leaves more room for cases, chargers, and other items.

Which is Bigger?

Overall size: Galaxy S23 Ultra is 0.5 mm wider and 0.6 mm taller than Galaxy S25 Ultra, making Galaxy S23 Ultra slightly larger overall.
Width: Galaxy S23 Ultra is wider (78.1 mm vs 77.6 mm, +0.5 mm).
Height: Galaxy S23 Ultra is taller (163.4 mm vs 162.8 mm, +0.6 mm).

Weight Comparison

Galaxy S23 Ultra weighs 234 g and Galaxy S25 Ultra weighs 218 g — a difference of 16 g. Galaxy S23 Ultra is 7.3% heavier than Galaxy S25 Ultra.

Thickness Comparison

Galaxy S23 Ultra is 8.9 mm thick and Galaxy S25 Ultra is 8.2 mm thick (+0.7 mm). Galaxy S23 Ultra is the thicker device in hand.

FAQ

Which phone is bigger?: Galaxy S23 Ultra is 0.5 mm wider and 0.6 mm taller than Galaxy S25 Ultra (78.1 × 163.4 mm vs 77.6 × 162.8 mm).
Which phone is lighter?: Galaxy S25 Ultra is lighter at 218 g versus Galaxy S23 Ultra at 234 g (16 g difference).
Which phone is thinner?: Galaxy S25 Ultra is thinner at 8.2 mm compared with Galaxy S23 Ultra at 8.9 mm (0.70 mm difference).
Which phone is easier to carry?: Galaxy S25 Ultra is easier to carry with a smaller overall body size (77.6 × 162.8 × 8.2 mm, 218 g) than Galaxy S23 Ultra (78.1 × 163.4 × 8.9 mm, 234 g).
Which phone is better for one-handed use?: Galaxy S25 Ultra is better for one-handed use with a 77.6 mm width, 162.8 mm height, and 218 g weight versus Galaxy S23 Ultra at 78.1 mm, 163.4 mm, and 234 g.

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Open Galaxy S23 Ultra and Galaxy S25 Ultra in the comparison tool