Which phone is lighter?

Galaxy S26 Ultra is lighter at 214 g versus Galaxy S23 Ultra at 234 g (20 g difference).

Which phone is thinner?

Galaxy S26 Ultra is thinner at 7.9 mm compared with Galaxy S23 Ultra at 8.9 mm (1.00 mm difference).

Which phone is easier to carry?

Galaxy S26 Ultra is easier to carry with a smaller overall body size (78.1 × 163.6 × 7.9 mm, 214 g) than Galaxy S23 Ultra (78.1 × 163.4 × 8.9 mm, 234 g).

Which phone is better for one-handed use?

Galaxy S26 Ultra is better for one-handed use with a 78.1 mm width, 163.6 mm height, and 214 g weight versus Galaxy S23 Ultra at 78.1 mm, 163.4 mm, and 234 g.

Which device is heavier?

Galaxy S23 Ultra is heavier at 234g compared with Galaxy S26 Ultra at 214g.

How much heavier is Galaxy S23 Ultra than Galaxy S26 Ultra?

Galaxy S23 Ultra is 20g heavier than Galaxy S26 Ultra (234g vs 214g).

Is the weight difference noticeable?

Yes — the 20g gap is somewhat noticeable. Galaxy S23 Ultra (234g) can feel a bit heavier than Galaxy S26 Ultra (214g) during long one-handed use or pocket carry.

Device Size Comparison

Galaxy S23 Ultra vs Galaxy S26 Ultra

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Comparison Summary

Both devices share the same 78.1 mm width, Galaxy S23 Ultra is noticeably heavier (234 g vs 214 g), and Galaxy S23 Ultra is noticeably thicker (8.9 mm vs 7.9 mm). Galaxy S26 Ultra is 0.2 mm taller than Galaxy S23 Ultra, making Galaxy S26 Ultra slightly larger overall on paper.

Key Differences

Weight
The Galaxy S23 Ultra is 20g heavier than the Galaxy S26 Ultra (9.3%).
Thickness
The Galaxy S23 Ultra is 1mm thicker than the Galaxy S26 Ultra.
Height
The Galaxy S26 Ultra is 0.2mm taller than the Galaxy S23 Ultra.
Width
The Galaxy S23 Ultra and Galaxy S26 Ultra are the same width at 78.1mm.

Winner Cards

Smaller body

Galaxy S23 Ultra

Galaxy S23 Ultra (78.1 × 163.4 mm) vs Galaxy S26 Ultra (78.1 × 163.6 mm).

Lighter weight

Galaxy S26 Ultra

Galaxy S26 Ultra (214 g) vs Galaxy S23 Ultra (234 g), 20 g lighter.

Thinner design

Galaxy S26 Ultra

Galaxy S26 Ultra (7.9 mm) vs Galaxy S23 Ultra (8.9 mm).

Pocketability

Galaxy S26 Ultra

Galaxy S26 Ultra has a smaller overall body size for pocket carry (78.1 × 163.6 × 7.9 mm).

Larger overall size

Galaxy S26 Ultra

Galaxy S26 Ultra is 0.2 mm taller than Galaxy S23 Ultra (78.1 × 163.6 mm vs 78.1 × 163.4 mm).

Dimension Comparison Table

Dimension	Galaxy S23 Ultra	Galaxy S26 Ultra	Difference
Width	78.1 mm	78.1 mm	0 mm
Height	163.4 mm	163.6 mm	+0.2 mm
Thickness	8.9 mm	7.9 mm	-1 mm
Weight	234 g	214 g	-20 g

Real-world Usage

Pocket Carry

The Galaxy S26 Ultra's slimmer edge may slide into jeans or jacket pockets more easily, and the Galaxy S26 Ultra has the smaller listed frame for upright storage.

One-Hand Use

One-handed grip and thumb reach should feel similar because both models are close on width and height.

Daily Comfort

Listed weight and bulk move together here: the Galaxy S23 Ultra is both heavier and larger, which can feel more substantial during routine handheld use.

Travel & Bag Carry

The Galaxy S26 Ultra uses more organizer space in a bag or backpack; the Galaxy S23 Ultra leaves more room beside cases and chargers, and the Galaxy S23 Ultra adds more listed mass to a packed carry.

Buying Recommendation

Who should choose the Galaxy S23 Ultra?

Choose the Galaxy S23 Ultra if shorter 163.4 mm height (vs 163.6 mm) and smaller width × height footprint (78.1 × 163.4 mm vs 78.1 × 163.6 mm) matter most to you, even though it also has higher listed weight (234g vs 214g) and thicker 8.9 mm edge (vs 7.9 mm) compared with the Galaxy S26 Ultra.

Who should choose the Galaxy S26 Ultra?

Choose the Galaxy S26 Ultra if lighter listed weight (214g vs 234g) and thinner 7.9 mm profile (vs 8.9 mm) matter most to you, even though it also has taller 163.6 mm frame (vs 163.4 mm) and larger overall footprint (78.1 × 163.6 mm vs 78.1 × 163.4 mm) compared with the Galaxy S23 Ultra.

Overall recommendation

Overall, the Galaxy S26 Ultra is the more compact pick on listed size, and the Galaxy S23 Ultra is the larger option for buyers who want more physical presence from the official dimensions alone.

FAQ

Which phone is bigger?: Galaxy S26 Ultra is 0.2 mm taller than Galaxy S23 Ultra (78.1 × 163.6 mm vs 78.1 × 163.4 mm).
Which phone is lighter?: Galaxy S26 Ultra is lighter at 214 g versus Galaxy S23 Ultra at 234 g (20 g difference).
Which phone is thinner?: Galaxy S26 Ultra is thinner at 7.9 mm compared with Galaxy S23 Ultra at 8.9 mm (1.00 mm difference).
Which phone is easier to carry?: Galaxy S26 Ultra is easier to carry with a smaller overall body size (78.1 × 163.6 × 7.9 mm, 214 g) than Galaxy S23 Ultra (78.1 × 163.4 × 8.9 mm, 234 g).
Which phone is better for one-handed use?: Galaxy S26 Ultra is better for one-handed use with a 78.1 mm width, 163.6 mm height, and 214 g weight versus Galaxy S23 Ultra at 78.1 mm, 163.4 mm, and 234 g.
Which device is heavier?: Galaxy S23 Ultra is heavier at 234g compared with Galaxy S26 Ultra at 214g.
How much heavier is Galaxy S23 Ultra than Galaxy S26 Ultra?: Galaxy S23 Ultra is 20g heavier than Galaxy S26 Ultra (234g vs 214g).
Is the weight difference noticeable?: Yes — the 20g gap is somewhat noticeable. Galaxy S23 Ultra (234g) can feel a bit heavier than Galaxy S26 Ultra (214g) during long one-handed use or pocket carry.

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