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Claim analyzed
Tech“A typical smartphone is roughly 8 millimetres thick.”
Submitted by Bold Raven 2656
The conclusion
Open in workbench →The evidence supports this as a sound rule of thumb. Official specifications from major manufacturers place many mainstream smartphones around 7.6-8.3 mm thick, making “roughly 8 millimetres” a fair description of a typical handset. Thickness varies by segment, and quoted dimensions usually exclude camera bumps, but those details do not change the basic picture.
Caveats
- Official thickness figures usually measure the body only and often exclude the camera bump, so real-world perceived thickness can be higher.
- Phone thickness varies by category: budget models, gaming phones, foldables, and ultra-thin designs can sit well outside the ~8 mm norm.
- The current market trend includes some thinner flagship models, so 8 mm is a rough central benchmark, not a fixed standard.
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Sources
Sources used in the analysis
Apple’s official technical specifications for the iPhone 15 Pro state the dimensions as: "Height: 146.6 mm (5.78 inches)", "Width: 70.6 mm (2.78 inches)", and "Depth: 8.25 mm (0.32 inches)." The "Depth" measurement corresponds to the phone’s thickness and shows a value just over 8 mm for a recent flagship.
In the "Size and Weight" section for iPhone 15, Apple lists: "Depth: 0.31 inch (7.80 mm)." This shows the device thickness is 7.80 millimetres, slightly under 8 mm.
Apple’s official tech specs for iPhone 15 Pro list under "Size and Weight": "Depth: 0.32 inch (8.25 mm)." This specifies that the iPhone 15 Pro model is 8.25 millimetres thick, slightly over 8 mm.
In the specifications table for Galaxy S24, Samsung lists: "Dimensions (HxWxD, mm) 147.0 x 70.6 x 7.6" indicating a thickness (depth) of 7.6 mm for the base S24 model. For the Galaxy S24+, it lists "158.5 x 75.9 x 7.7" and for the S24 Ultra "162.3 x 79.0 x 8.6", giving thicknesses of 7.7 mm and 8.6 mm respectively.
Apple’s iPhone 15 specs page lists for iPhone 15: "Height: 5.81 inches (147.6 mm)" "Width: 2.82 inches (71.6 mm)" "Depth: 0.31 inch (7.80 mm)". For iPhone 15 Plus it lists: "Depth: 0.31 inch (7.80 mm)." Both current non‑Pro models therefore have a thickness of 7.8 mm, close to 8 mm.
OnePlus’ spec sheet for the 10 Pro gives its dimensions as "Height: 163.0 mm; Width: 73.9 mm; Thickness: 8.55 mm." This places the device’s body depth close to 8.5 mm, consistent with other contemporary Android flagships that fall in the high‑7 to mid‑8 mm range.
For compact phones, HONOR lists typical dimensions as: "Height: 144 – 147 mm", "Width: 69 – 70 mm", "Thickness: 7 – 8 mm." For medium-size phones (6.1–6.5 inches), it states: "Typical dimensions: Height: 154 – 161 mm", "Width: 73 – 76 mm", "Thickness: 7 – 8.5 mm." For large size phones (6.6–6.9 inches), thickness is given as "7 – 9 mm."
MacRumors summarizes the dimensions: "iPhone 15 dimensions and weight: Thickness: 7.8mm" and later "iPhone 15 Pro dimensions and weight: Thickness: 8.25mm" and "iPhone 15 Pro Max dimensions and weight: Thickness: 8.25mm." It notes that "The iPhone 15 will maintain the exact same thickness as last year's model" at 7.8 mm.
Xiaomi’s official specs for the Xiaomi 14 list dimensions of "Height: 152.8 mm; Width: 71.5 mm; Thickness: 8.20 mm" for one finish and a slightly different thickness for another finish around the same value. This indicates another mainstream flagship phone with a body depth a little over 8 mm.
Discussing current designs, Android Authority notes: "Thankfully, smartphone makers settled on a middle ground, with most phones resting somewhere between 7 and 10 mm thick." The article contrasts this with rumored ultra‑thin models like the Galaxy S25 Slim (around 6 mm) and iPhone 17 Slim (5.5–6.25 mm), indicating these are thinner than the current mainstream range.
In the specifications for the OnePlus 9 Pro, OnePlus lists the dimensions as "Height: 163.2 mm", "Width: 73.6 mm", and "Thickness: 8.7 mm." This is an example of a popular Android flagship with thickness close to but slightly above 8 mm.
Xiaomi’s official specs for the Redmi Note 13 Pro 5G list the device dimensions as "Height: 161.15mm", "Width: 74.24mm", and "Thickness: 7.98mm." This mid‑range smartphone example has a thickness essentially at 8 mm.
The specifications page for the moto g 5G (2025) lists overall dimensions of "Height: 165.4 mm", "Width: 75.8 mm", and "Depth: 8.2 mm." Here, "Depth" is used to denote thickness, putting this mainstream budget/midrange device just over 8 mm thick.
In its 2026 buyer's guide, Android Authority gives detailed dimensions, especially for foldables, noting for the Galaxy Z Flip 7 that it has "a thickness of just 13.7mm when closed." For slab-style flagships like the Galaxy S25 series and others, the site typically reports body thicknesses in the mid–single-digit millimeter range when unfolded, though exact figures for every model are not all listed in this excerpt, indicating that modern phones generally fall under 10 mm thick.
Samsung’s buying guide highlights some of its thinnest current devices, stating that the "Galaxy S25 Edge" is its "slimmest Galaxy S series phone, measuring just 5.8mm" thick. It compares this to the "Galaxy S25+" which is "1.5mm thicker" (about 7.3 mm) and the "S25 Ultra," described as "2.4mm thicker" (about 8.2 mm) than the S25 Edge. For foldables, it claims the "Galaxy Z Fold7" is "just 4.2mm thin when unfolded" and that the "Galaxy Z Flip7" is "just 6.5mm when unfolded." These examples show premium devices ranging roughly from about 5.8 mm up to just over 8 mm for non-foldable flagships.
Reviewing 10 years of flagship designs, the article states: "Over the last 10 years, the base model of the Galaxy S series has been as thick as 8.5mm and as thin as 7.2mm." It adds that over the past decade "the base of the S series fluctuated between 8.5mm and 7.2mm in thickness," implying that many mainstream flagships cluster around this range.
PhoneSized maintains comparative size charts for smartphones and lists current very slim models such as "Samsung Galaxy S25 Edge 5.8 mm / 0.23 in; Motorola Edge 70 6 mm / 0.24 in; Huawei Enjoy 80 6.3 mm / 0.25 in." By allowing sorting and filtering by thickness, the charts show that while some models are around 6 mm, the bulk of contemporary phones on the site fall in a band roughly between 7 and 9 mm.
The GSMArena specification page for the Samsung Galaxy S24 lists its dimensions as "147 x 70.6 x 7.6 mm" in the body section. This indicates the current mainstream Samsung flagship phone has a thickness of 7.6 mm, within the 7–8 mm range.
The average smartphone in 2025 is somewhere between 7mm and 8mm thick. It's been that way for a while now, but some brands are trying to break new ground with devices that are under 6mm.
In recent years, many mainstream smartphones have clustered around roughly 7 mm to 9 mm thick, with camera bumps excluded or measured separately depending on the source and model. That makes 8 mm a reasonable rough typical value, but not a universal standard across all smartphones.
The iPhone XR is 8.3 mm thick. They haven’t gotten much thinner than 7mm. Ultimately, the size of a smartphone will vary based on what it’s being used for.
The Tecno Slim is the thinnest curved screen smartphone in the world right now, measuring in at 5.95mm and weighing just 156 grams.
The phone is barely 4.21 mm unfolded, and when folded it is just about 9 mm, which is close to a regular smartphone thickness.
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Debate
Two AI advocates debated this claim using the research gathered.
Argument for
Multiple authoritative manufacturer sources confirm that 8 mm is a highly accurate rough approximation for typical smartphone thickness: Source 3 shows the iPhone 15 Pro at 8.25 mm, Source 9 shows the Xiaomi 14 at 8.20 mm, Source 12 shows the Redmi Note 13 Pro at 7.98 mm (essentially 8 mm), Source 13 shows the Moto G 5G at 8.2 mm, and Source 6 shows the OnePlus 10 Pro at 8.55 mm. Furthermore, Source 19 explicitly states 'the average smartphone in 2025 is somewhere between 7mm and 8mm thick,' and Source 10 confirms 'most phones resting somewhere between 7 and 10 mm thick,' making 8 mm a well-supported, centrally accurate 'rough' figure for a typical smartphone's thickness.
The Proponent cherry-picks a handful of slab phones clustered near 8 mm and then equivocates from “some common examples” to “a typical smartphone,” while the broader brief explicitly defines “typical” thickness as a range that shifts by size and model class (7–9 mm in Source 7; 7–10 mm in Source 10), undermining any claim that ~8 mm is the typical value rather than merely one point within a wide band. Even the Proponent's own cited evidence contradicts an 8 mm center: Source 19 places the 2025 average “somewhere between 7mm and 8mm,” and manufacturer specs in the brief include mainstream outliers like 7.6 mm (Galaxy S24, Source 4) and 8.6 mm (Galaxy S24 Ultra, Source 4) plus 5.8 mm “thin” flagships (Source 15), so “roughly 8 mm” is not a reliable description of what is typical across smartphones.
Argument against
The brief shows “typical” smartphone thickness is not roughly 8 mm but spans a wide band—HONOR puts common phones anywhere from 7–9 mm depending on size (Source 7) and Android Authority says most phones sit between 7 and 10 mm (Source 10), so 8 mm is not a reliable typical value. Even among mainstream flagships and current “thin” models, thickness ranges from 5.8 mm (Galaxy S25 Edge) to about 8.6 mm (Galaxy S24 Ultra) (Sources 15 and 4), contradicting the motion's implication of a single ~8 mm norm.
The Opponent commits a straw man fallacy by conflating a 'rough approximation' with a claim of a 'single universal norm'; the motion states 'roughly 8 mm,' and Source 19 explicitly confirms the average smartphone in 2025 is 'somewhere between 7mm and 8mm thick,' placing 8 mm squarely at the upper boundary of that central range. Furthermore, the Opponent cherry-picks outliers such as the ultra-thin Galaxy S25 Edge (Source 15) and the oversized S24 Ultra (Source 4) — premium edge-case devices — while ignoring the cluster of mainstream models documented in Sources 3, 9, 12, and 13, all of which fall between 7.98 mm and 8.25 mm, directly corroborating 8 mm as a sound rough typical value.
Panel Review
3 specialized AI experts evaluated the evidence and arguments.
Reviewer 1 — The Logic Examiner
Manufacturer specs for several mainstream slab phones cluster near 8 mm (e.g., iPhone 15 at 7.8 mm [2,5], iPhone 15 Pro at 8.25 mm [1,3], Galaxy S24 at 7.6 mm and S24+ at 7.7 mm [4], Xiaomi 14 at ~8.2 mm [9], Redmi Note 13 Pro 5G at 7.98 mm [12], Moto G 5G at 8.2 mm [13]), and broader summaries describe most/average phones as lying around 7–8 mm or within 7–10 mm ("average ... between 7mm and 8mm" [19]; "most phones ... between 7 and 10 mm" [10]), which makes ~8 mm a reasonable central approximation rather than a precise universal constant. The opponent is right that thickness varies and that some models are notably thinner or thicker (e.g., 5.8 mm S25 Edge [15], 8.6 mm S24 Ultra [4]), but that variability does not logically negate a "roughly" claim about a typical/central tendency, so the claim is mostly supported though not exact for all segments.
Reviewer 2 — The Context Analyst
The evidence consistently shows that mainstream smartphones cluster in the 7–9 mm range, with many popular models (iPhone 15 at 7.8 mm, Galaxy S24 at 7.6 mm, iPhone 15 Pro at 8.25 mm, Xiaomi 14 at 8.2 mm, Redmi Note 13 Pro at ~8 mm) falling close to 8 mm, and Source 19 explicitly states the 2025 average is 'somewhere between 7mm and 8mm.' The claim uses the qualifier 'roughly,' which is important context — however, the missing context is that the distribution skews slightly below 8 mm for many popular models (7.6–7.8 mm is common), ultra-thin flagships like the Galaxy S25 Edge (5.8 mm) are pushing the market lower, and the range is wide enough (7–9+ mm) that 8 mm is better described as the upper end of typical rather than the center. Still, 'roughly 8 mm' is a defensible rough approximation that does not create a fundamentally false impression, especially given the qualifier 'roughly' and the many real-world examples near that figure.
Reviewer 3 — The Source Auditor
Highly authoritative manufacturer specifications from Apple (Sources 1, 2, 3, 5), Samsung (Source 4), Xiaomi (Sources 9, 12), and Motorola (Source 13) consistently show mainstream smartphone depths clustering between 7.6 mm and 8.3 mm. Independent industry analyses from Android Authority (Source 10) and 9to5Google (Source 19) confirm that the average smartphone thickness sits between 7 mm and 8 mm, making 'roughly 8 millimetres' an exceptionally accurate description of a typical device.