Galaxy S25 Ultra vs Galaxy S26 Ultra: size comparison
Galaxy S26 Ultra is 0.8 mm taller and 0.5 mm wider than Galaxy S25 Ultra. Galaxy S25 Ultra would fit inside the outline of Galaxy S26 Ultra.
Galaxy S25 Ultra measures 162.8 x 77.6 x 8.2 mm (height x width x thickness), while Galaxy S26 Ultra measures 163.6 x 78.1 x 7.9 mm.
Both phones are drawn to the same scale on a grid where each square is 10 mm. Blue is Galaxy S25 Ultra, coral is Galaxy S26 Ultra.
| Galaxy S25 Ultra | Galaxy S26 Ultra | Difference | |
|---|---|---|---|
| Height | 162.8 mm | 163.6 mm | +0.8 mm |
| Width | 77.6 mm | 78.1 mm | +0.5 mm |
| Thickness | 8.2 mm | 7.9 mm | -0.3 mm |
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What the size difference means in daily use
One-handed use
The two phones are almost exactly as wide (77.6 mm and 78.1 mm), so reaching across the screen with one hand should feel much the same on both. Phones around 77 mm wide or more are usually the ones people describe as large.
Pockets and bags
The heights are within a millimetre of each other, so neither phone sits noticeably deeper in a pocket. Thickness differs by only 0.3 mm, which is too small to notice in everyday use.
Cases and screen protectors
The outside sizes are almost identical, but cases also depend on camera cut-outs, button positions and port locations, so check the exact model before buying accessories made for the other phone.
Frequently asked questions
Is Galaxy S26 Ultra bigger than Galaxy S25 Ultra?
Galaxy S26 Ultra is 0.8 mm taller and 0.5 mm wider than Galaxy S25 Ultra. Galaxy S25 Ultra would fit inside the outline of Galaxy S26 Ultra. Thickness differs by 0.3 mm.
Will a case for Galaxy S25 Ultra fit Galaxy S26 Ultra?
The outside sizes are almost identical, but cases also depend on camera cut-outs, button positions and port locations, so check the exact model before buying accessories made for the other phone.
Which is easier to hold with one hand, Galaxy S25 Ultra or Galaxy S26 Ultra?
The two phones are almost exactly as wide (77.6 mm and 78.1 mm), so reaching across the screen with one hand should feel much the same on both. Phones around 77 mm wide or more are usually the ones people describe as large.
About these numbers
Sizes are height x width x thickness in millimetres, taken from manufacturer and retailer spec pages and phone databases. Thickness can differ slightly by colour or back material, and where sources show a range we use the larger value. If you spot a wrong number, please tell us and we will fix it.