Iphone 8 Plus Vs 6 Plus Are The Dimensions Really That Different

When Apple released the iPhone 8 Plus in 2017, many users upgrading from the iPhone 6 Plus noticed something unexpected: despite being two generations apart, the phones looked nearly identical at first glance. This raises a common question among consumers—especially those upgrading after years of use—are the physical dimensions between the iPhone 8 Plus and iPhone 6 Plus actually different enough to impact daily use?

The short answer is yes—but only slightly. While both devices share a similar design language, subtle changes in thickness, weight, and internal construction create noticeable differences in hand feel and pocketability. Understanding these nuances helps buyers make informed decisions, especially when accessories, cases, or screen visibility matter.

Design Evolution: From 6 Plus to 8 Plus

The iPhone 6 Plus launched in 2014 with a groundbreaking 5.5-inch display, marking Apple’s entry into the phablet era. Its aluminum unibody design was sleek for its time but prone to bending under pressure—a flaw humorously dubbed \"Bendgate.\" Fast forward to 2017, and the iPhone 8 Plus arrived with an almost identical silhouette, yet packed modern internals and a glass back for wireless charging.

Despite visual similarities, Apple made key refinements. The 8 Plus features a stronger aerospace-grade aluminum frame, improved water resistance (IP67), and a more durable front glass. These upgrades didn’t drastically alter the footprint, but they did shift the balance and texture of the device.

Tip: If you're using a case designed for the iPhone 6 Plus, it may fit the 8 Plus—but check button alignment and camera cutout clearance.

Detailed Dimension Comparison

To assess whether the size difference matters, let’s break down the exact measurements of both models.

Specification	iPhone 6 Plus	iPhone 8 Plus
Height	158.1 mm (6.22 inches)	158.4 mm (6.24 inches)
Width	77.8 mm (3.06 inches)	78.1 mm (3.07 inches)
Thickness	7.1 mm (0.28 inches)	7.5 mm (0.30 inches)
Weight	172 grams (6.07 oz)	200 grams (7.05 oz)
Display Size	5.5 inches	5.5 inches
Bezel Width	Wider side bezels	Slightly reduced bezels
Rear Material	Aluminum	Glass with aluminum band

As shown, the height and width differ by less than 0.4 mm—essentially negligible. However, the 0.4 mm increase in thickness and the 28-gram weight gain are perceptible. The added heft comes from the glass back, larger battery, and updated internal components. Users upgrading from the 6 Plus often report the 8 Plus feels “denser” and more premium, though slightly less nimble in one-handed use.

Real-World Implications of Size Differences

In everyday scenarios, such minor dimensional shifts don’t affect usability dramatically. Both phones require two hands for comfortable typing and navigation. But there are practical considerations:

• Pocket Fit: The extra 0.3 mm in width may make the 8 Plus slightly tighter in snug jeans pockets.
• Case Compatibility: Third-party cases for the 6 Plus often fit the 8 Plus due to near-identical outlines, but precise cutouts for the rear camera and buttons can vary.
• Grip Comfort: The slightly thicker profile of the 8 Plus provides better edge grip, reducing accidental drops.

“While Apple maintained the same screen size across generations, the shift to glass-back construction changed how the phone balances in your hand—even if the numbers look similar.” — David Lin, Mobile Device Analyst at TechInsight Weekly

Performance and Usability Beyond Size

Though this article focuses on dimensions, it’s worth noting that the 8 Plus outperforms the 6 Plus in nearly every functional category. The A11 Bionic chip, improved cameras with portrait mode, longer software support, and faster charging all contribute to a significantly better user experience—despite the similar shell.

The retained form factor was intentional. Apple knew many users had invested in docks, car mounts, and protective cases. By keeping the external dimensions consistent, they eased the transition for long-term customers while quietly upgrading what mattered inside.

Mini Case Study: Sarah’s Upgrade Journey

Sarah had used her iPhone 6 Plus since 2015. By 2020, the battery life had degraded significantly, and iOS updates slowed performance. She hesitated to upgrade, fearing newer models would be too large. When she tested the iPhone 8 Plus at an Apple Store, she was surprised—it felt familiar. The size matched her muscle memory, but the responsiveness and camera quality were night and day.

She kept her existing leather folio case, which fit well enough, though the camera bump required careful alignment. For Sarah, the nearly identical dimensions made the switch seamless, proving that sometimes, minimal change is strategic, not lazy.

Checklist: What to Consider When Upgrading from 6 Plus to 8 Plus

Before making the move, evaluate these factors:

1. ✅ Check if your current case fits—measure camera placement and button locations.
2. ✅ Test the weight difference in-store; some users find the 8 Plus heavier over long use.
3. ✅ Confirm accessory compatibility (docks, chargers, mounts).
4. ✅ Assess battery health—if your 6 Plus still performs adequately, consider a battery replacement instead.
5. ✅ Factor in software support: The 6 Plus stopped receiving updates after iOS 12, while the 8 Plus supports up to iOS 17.

Frequently Asked Questions

Can I use an iPhone 6 Plus case on the iPhone 8 Plus?

Most rigid cases designed for the 6 Plus will fit the 8 Plus due to nearly identical dimensions. However, soft silicone or precision-cut cases may not align perfectly with the camera or buttons. Always verify fit before relying on protection.

Why did Apple keep the same size for so long?

Apple prioritized user familiarity and accessory continuity. Maintaining the 5.5-inch form allowed millions of users to upgrade without relearning handling or repurchasing gear. It also gave Apple time to refine internal technology before shifting to the notch-based designs of the iPhone X and later.

Is the iPhone 8 Plus noticeably heavier than the 6 Plus?

Yes, the 28-gram difference (about 1 ounce) is noticeable during prolonged use, such as reading or watching videos. Some describe the 8 Plus as feeling “more substantial,” while others say it fatigues the hand faster.

Conclusion: Dimensions Matter—But So Does Context

The iPhone 8 Plus and iPhone 6 Plus are remarkably close in size, differing by fractions of a millimeter in height and width. The most meaningful changes are in thickness and weight—subtle on paper, but tangible in daily use. For users clinging to their 6 Plus out of concern for ergonomics, the 8 Plus offers a nearly identical footprint with vastly improved performance, longevity, and features.

If you're debating an upgrade, don’t let near-identical specs fool you into thinking nothing has changed. Sometimes, the most important improvements happen beneath the surface. The consistency in dimensions wasn’t stagnation—it was thoughtful evolution.

💬 Have you upgraded from the 6 Plus to the 8 Plus? Did the size surprise you? Share your experience in the comments below and help others navigate their next move.