The Galaxy S8 measures about 148.9 x 68.1 x 8.0 mm and 155 g, giving you a tall 5.8 inch display in a surprisingly compact body.
Dimensions Of The Galaxy S8 At A Glance
The Samsung Galaxy S8 came out in 2017, but its size still feels modern. Samsung lists the phone at 148.9 mm tall, 68.1 mm wide, and 8.0 mm thick with a weight of 155 g for the standard model on its official Galaxy S8 spec page. That footprint gives you a 5.8 inch curved OLED screen with slim bezels and the tall 18.5:9 aspect ratio.
If you prefer inches, the Galaxy S8 stands around 5.86 inches high, 2.68 inches wide, and roughly 0.31 inches thick. The curved “infinity” front glass stretches close to every edge, so the screen dominates the front while the physical body stays narrower than many newer phones.
Quick Spec Snapshot
- Body size — 148.9 x 68.1 x 8.0 mm (about 5.86 x 2.68 x 0.31 inches).
- Weight — 155 g (about 5.47 oz).
- Screen size — 5.8 inch display measured diagonally.
- Aspect ratio — 18.5:9 panel, taller than classic 16:9 phones.
- Frame and build — glass front and back with an aluminum frame and IP68 water resistance.
Sizing information on height, width, thickness, and weight matches the official Samsung spec sheet for the Galaxy S8, and you will see the same numbers repeated on the Android phone listing and major spec databases online.
How The Galaxy S8 Fits In Hand And Pocket
The dimensions of the Galaxy S8 give you a phone that feels narrow and tall instead of bulky. The 68.1 mm width is the main number to watch here. Many current flagships sit closer to 72–76 mm wide, and that extra few millimeters makes one handed use tougher on smaller hands.
The curved side glass and rounded frame edges help the Galaxy S8 sit comfortably in the palm. At 8.0 mm thick, it is thin enough to slip into a jeans pocket without feeling like a brick, while the 155 g weight keeps it from feeling too light or too dense.
Grip And One Hand Use
Grip depends on both width and weight, and the Galaxy S8 hits a balanced mix. Narrow width makes it easier for your thumb to travel across the keyboard or notification shade. The tall body can still stretch shorter thumbs near the absolute top, but most people can reach the center of the display without shuffling the phone down in the hand.
- Thumb reach — the 2.68 inch width suits one handed typing for many users, even with a case.
- Curved edges — the front glass rolls into the frame, which softens the side edges and helps with grip but can feel slippery with dry hands.
- Button placement — the power and volume keys sit along the sides, roughly where your index finger rests, and the Bixby button sits slightly lower on the left.
If you often use your phone while walking or holding a bag, the Galaxy S8 dimensions give you a safer hold compared with larger devices. Many users still pick it up today for that reason alone.
Pocket Comfort And Daily Carry
Pocket comfort ties closely to height and thickness. The Galaxy S8 height of 148.9 mm keeps it shorter than many recent Android phones, so back pockets and jacket pockets swallow it without sticking out as much. The 8.0 mm thickness feels slim enough that the phone sits flat against your leg while you sit or crouch.
- Front pocket use — the compact width means less pressure on tighter jeans and less bulge when you sit down.
- Back pocket risk — the slim glass body can flex if you sit directly on it, so a case helps spread pressure and protect the curved screen.
- Bag and purse carry — the light 155 g weight makes the Galaxy S8 easy to spot by feel without adding much load to a small bag.
If you come from a larger 6.5 or 6.7 inch device, the Galaxy S8 will feel compact and easier to stow. If your last phone was a smaller 4.7 inch model, it may feel tall at first, but the narrow frame softens that change.
Galaxy S8 Dimensions Compared With Other Models
Numbers on a spec sheet can feel abstract, so it helps to see the Galaxy S8 dimensions lined up next to related models. Samsung produced three main phones around this design: the Galaxy S8, the larger Galaxy S8 Plus, and the rugged Galaxy S8 Active.
Galaxy S8 Versus Galaxy S8 Plus And S8 Active
All three share a similar design language, but the dimensions shift enough to change the way they feel in hand. The Galaxy S8 sits as the smallest and lightest option, the S8 Plus stretches the same idea into a larger size, and the S8 Active trades curves for a thicker, more protective shell.
| Model | Dimensions (mm) | Weight (g) |
|---|---|---|
| Galaxy S8 | 148.9 x 68.1 x 8.0 | 155 |
| Galaxy S8 Plus | 159.5 x 73.4 x 8.1 | 173 |
| Galaxy S8 Active | 151.9 x 74.9 x 9.9 | 208 |
The Galaxy S8 Plus gains roughly 10.6 mm in height and 5.3 mm in width compared with the Galaxy S8, along with a small bump in thickness and weight. That larger footprint gives you a 6.2 inch screen and a bit more battery capacity. The Galaxy S8 Active increases all three dimensions and weight to build in extra protection and a bigger battery, which makes it feel more like a chunky outdoor phone.
Galaxy S8 Compared With Newer Phones
Place the dimensions of the Galaxy S8 next to many modern flagships and you can see how compact it looks. Plenty of current Android phones fall in the 160–165 mm height range with widths around 75 mm and weights that drift up near 200 g or more.
- Height difference — a modern 6.7 inch Android phone can tower over the Galaxy S8 by more than a centimeter.
- Width difference — wider frames push your thumb farther from the far edge, which makes one handed reach tougher.
- Weight jump — new models often add 30–50 g over the Galaxy S8, and that added mass is noticeable during long reading or gaming sessions.
If you like compact phones and plan to buy a used device or keep an older handset as a backup, the Galaxy S8 size still feels practical for day to day use, even in 2026.
Why The Exact Dimensions Matter For Cases And Accessories
The dimensions of the Galaxy S8 do more than describe the shell. They decide what cases, screen protectors, mounts, and grips fit correctly. A few millimeters in height or width can be the difference between a snug case and a sloppy fit that lets grit rub against the curves of the glass.
Case Styles And Added Bulk
Case choice can change how the Galaxy S8 dimensions feel. A slim clear case might add only around 1 mm in thickness and a tiny amount of width, while a rugged case with raised bumpers can make the phone feel far larger in hand.
- Slim cases — thin TPU or clear plastic adds light protection while keeping the 68.1 mm width close to stock.
- Rugged cases — thicker plastics and rubber layers increase width and thickness, which improves drop protection but can make one handed reach harder.
- Wallet cases — front flaps attached to the side change the way you grip the phone and add bulk in pockets, even though the underlying Galaxy S8 shell stays the same.
When you shop for a case online, always match the exact model name and check that the listing calls out the Galaxy S8, not the S8 Plus or the S9 generation, because small changes in dimensions place the camera cutout and buttons in different spots.
Screen Protectors And Edge Curves
The curved front glass on the Galaxy S8 makes traditional flat screen protectors tricky. A cheap protector cut for another 5.8 inch phone might shield only part of the display or lift at the edges because the curve on the Galaxy S8 drops away sooner.
- Full coverage protectors — glass protectors shaped for the Galaxy S8 curve wrap close to the edge without lifting when used with slim cases.
- Case friendly cuts — some protectors stop short of the curve to avoid conflict with thicker cases, which leaves a tiny border of exposed glass.
- Installation tools — kits that include frames help align the protector with the edges so the dimensions line up correctly.
Check product pages for photos or diagrams that show how far the protector reaches toward the curved edges. When in doubt, user reviews that mention tight fit, bubbles, or peeling corners can help you judge whether the listed dimensions match the Galaxy S8 shape.
Dimensions Of The Galaxy S8 In Real World Use
Specs are helpful, but real value comes from the way those dimensions change daily tasks. The Galaxy S8 size influences everything from gaming comfort to typing speed and how easy it feels to steady the camera for a low light photo.
Typing, Scrolling, And Media
The 18.5:9 display gives chat apps and browsers extra vertical space. You see more lines of text at once compared with older 16:9 phones of similar height. At the same time, the narrow 68.1 mm body keeps on screen keys within reach, so your thumbs do not travel as far side to side.
- Typing — most people can reach every letter of the keyboard in portrait without stretching across unused space.
- Reading — the tall display helps fit more text while you scroll through long articles or social feeds.
- Video — when you turn the phone sideways, black bars may appear on older 16:9 videos, but newer wide content fills more of the panel.
For gaming, the lighter 155 g weight helps during long sessions, and the narrow frame lets you grip the phone comfortably in horizontal orientation without blocking speakers or ports.
Camera Use And Stability
Handheld photos depend on stability, which links to how easily you can wrap your fingers around the body. The Galaxy S8 width and thickness let you pinch the edges without strain, and the curved back rests into your palm.
- One handed shots — the smaller body makes it easier to tap the shutter with your thumb or index finger while holding the phone upright.
- Horizontal grip — in horizontal orientation, your fingers can sit along the longer sides without feeling stretched, which helps reduce blur from hand shake.
- Tripods and grips — many clamp mounts rated for 4.7 to 6.0 inch phones fit the Galaxy S8 well, as long as the jaws span at least 70 mm of width.
If you add a thick case, think about the new width and thickness numbers, because extra bulk can change where your fingers land while you frame a shot or reach the fingerprint sensor.
Checking Galaxy S8 Dimensions Against Accessories
Before you order a car mount, bike mount, controller clip, or armband, matching accessory specs to the dimensions of the Galaxy S8 saves time and returns. Product listings usually quote the maximum supported height and width or a range of phone sizes.
Simple Steps To Match Dimensions
- Note the bare phone size — write down 148.9 x 68.1 x 8.0 mm so you can compare while shopping.
- Add case thickness — if you use a case, add the extra millimeters to height, width, and thickness based on the case description.
- Check accessory ranges — look for clamps or pockets that fit at least 150 mm in height and 70 mm in width to leave a little wiggle room.
- Watch depth limits — some mounts list a maximum thickness, so confirm that your case plus phone stays under that number.
- Read user reviews — comments that mention the Galaxy S8 by name or list similar dimensions offer reassurance that the fit works.
For extra certainty, you can compare the Galaxy S8 measurements against charts from accessory makers or check fit tools that list popular phones by name. Many case and mount brands map their product ranges to this phone because it sold in large numbers worldwide.
Trusted Sources For Galaxy S8 Size Information
When you need to double check numbers, the safest place to start is the official manufacturer spec page. Samsung provides height, width, thickness, and weight listings for the Galaxy S8 on its product site, along with details about materials and water resistance ratings.
You can cross check those same dimensions on the Android device listing for the Galaxy S8, which repeats the height, width, thickness, and weight figures for both the 5.8 inch and 6.2 inch models. Cross checking helps confirm that accessory listings match the actual shell size and not a misprinted number.
Who The Galaxy S8 Size Suits Best
The dimensions of the Galaxy S8 place it in a sweet spot for people who want a phone that feels modern but still easy to hold. It gives you a tall, sharp display for scrolling through apps, reading news, or watching video, while the narrower width and lighter weight stay friendly to one handed use.
If you often struggle with giant phones, if you wear tighter jeans or smaller jackets, or if you just prefer a handset that disappears in a pocket, the Galaxy S8 size keeps daily use simple. On the other hand, if you love the biggest screens possible or want the longest battery life you can find, larger phones like the Galaxy S8 Plus or newer 6.7 inch devices might suit you better.
As long as you understand the exact dimensions of the Galaxy S8 and how they interact with cases, protectors, and mounts, it remains a compact, comfortable choice for calls, messages, and streaming in a smaller package than many current flagships.