Device Size Comparison

Galaxy S23 Ultra vs Galaxy S25 Ultra

Size Comparison Summary

Galaxy S23 Ultra measures 78.1 × 163.4 × 8.9 mm and weighs 234 g. Galaxy S25 Ultra measures 77.6 × 162.8 × 8.2 mm and weighs 218 g. By overall front-face area, Galaxy S23 Ultra is larger than Galaxy S25 Ultra (about 128.3 mm² difference). Galaxy S23 Ultra is 16 g heavier than Galaxy S25 Ultra. All figures use official millimeter dimensions.

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

Which is Bigger?

Overall size (width × height): Galaxy S23 Ultra has the larger footprint at 78.1 × 163.4 mm vs 77.6 × 162.8 mm (+128.26 mm² area).
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 is bigger, Galaxy S23 Ultra or Galaxy S25 Ultra?: Galaxy S23 Ultra has the larger overall footprint (78.1 × 163.4 mm) compared with Galaxy S25 Ultra (77.6 × 162.8 mm).
How much heavier is Galaxy S23 Ultra than Galaxy S25 Ultra?: Galaxy S23 Ultra weighs 234 g and Galaxy S25 Ultra weighs 218 g — a difference of 16 g.
Which device is thinner, Galaxy S23 Ultra or Galaxy S25 Ultra?: Galaxy S25 Ultra is thinner at 8.2 mm vs 8.9 mm for Galaxy S23 Ultra.
What is the width difference between Galaxy S23 Ultra and Galaxy S25 Ultra?: Galaxy S23 Ultra is 78.1 mm wide and Galaxy S25 Ultra is 77.6 mm wide (-0.5 mm).
Can I compare Galaxy S23 Ultra and Galaxy S25 Ultra visually?: Yes. Use the Sizology comparison tool to overlay or place both devices side by side at true millimeter scale with official dimensions.

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