When Apple first introduced the iPhone SE, the "Special Edition" was more than just a budget-friendly alternative; it was a commitment to a compact form factor that many users felt the industry had abandoned. If you are trying to understand the physical footprint of these devices, the answer depends heavily on which generation you are holding.

As of early 2025, the iPhone SE line has officially reached a turning point. With the discontinuation of the third-generation model in February 2025 and the release of the iPhone 16e, the era of the 4.7-inch "Home Button" design has concluded. This article breaks down every dimension, weight, and screen measurement of the iPhone SE lineage to help you understand exactly how big these classic devices are compared to modern standards.

Quick Reference: iPhone SE Dimensions Table

For those looking for a rapid comparison, here is the essential data for all three versions of the iPhone SE.

Generation Release Year Screen Size Height Width Depth Weight
1st Gen 2016 4.0 inches 4.87 in (123.8 mm) 2.31 in (58.6 mm) 0.30 in (7.6 mm) 3.99 oz (113 g)
2nd Gen 2020 4.7 inches 5.45 in (138.4 mm) 2.65 in (67.3 mm) 0.29 in (7.3 mm) 5.22 oz (148 g)
3rd Gen 2022 4.7 inches 5.45 in (138.4 mm) 2.65 in (67.3 mm) 0.29 in (7.3 mm) 5.09 oz (144 g)

The First Generation iPhone SE: The 4-Inch Icon

The original iPhone SE, released in March 2016, remains one of the most beloved smartphones in Apple's history specifically because of its size. It used the chassis of the iPhone 5s but packed the internals of the iPhone 6s.

Physical Footprint and Ergonomics

At just 4.87 inches tall and 2.31 inches wide, the first-gen SE was the pinnacle of "one-handed" design. For users with smaller hands or those who prefer to keep their phone in a shirt pocket, its dimensions were nearly perfect. The square-edged, industrial design made it feel secure in the hand, unlike the more "slippery" curved designs that followed.

Screen-to-Body Ratio

Despite its small footprint, the first-gen SE had significant bezels at the top and bottom to accommodate the FaceTime camera and the original circular Home button. The 4-inch Retina display offered a resolution of 1136-by-640 pixels. While tiny by today's standards, its 326 ppi (pixels per inch) density meant text was as sharp as it was on much larger, more expensive models.

The Second and Third Generation: The 4.7-Inch Standard

In 2020 and again in 2022, Apple updated the SE line by moving it to the iPhone 8 chassis. This marked a significant jump in size from the original 2016 model.

Dimensional Consistency

The 2nd and 3rd generation iPhone SE models are physically identical in terms of height, width, and depth. They both measure 138.4 mm (5.45 inches) by 67.3 mm (2.65 inches). The only physical differentiator is weight; the 3rd generation (2022) is slightly lighter at 144 grams, compared to the 148 grams of the 2020 model, thanks to internal hardware optimizations.

Why 4.7 Inches?

The 4.7-inch display was the "Goldilocks" size for Apple for many years. It provided enough screen real estate for modern apps and video consumption while remaining narrow enough for most users to reach across the entire screen with a thumb.

In our testing, the 3rd Gen SE feels remarkably thin at just 7.3 mm. When compared to the "Pro" models of the iPhone 15 or 16, which often exceed 8 mm in thickness and 200 grams in weight, the SE feels like a feather in the pocket. It is the type of phone you can forget you are carrying.

How Big Is the iPhone SE Compared to the iPhone 16e?

With the recent transition to the iPhone 16e in early 2025, the concept of the "small iPhone" has changed. The iPhone 16e features an all-screen design, removing the Home button and the large bezels.

  • iPhone SE (3rd Gen) Screen: 4.7 inches (LCD)
  • iPhone 16e Screen: Approximately 6.1 inches (OLED)

While the screen of the 16e is significantly larger, the actual physical footprint of the phone does not grow proportionally. Because the 16e eliminates the "chin" and "forehead" of the SE, it packs a much larger display into a body that is only slightly taller and wider. However, for purists, the loss of the 4.7-inch width means the phone is slightly harder to grip for those with very small hands.

How to Measure Your Current Phone for Comparison

If you are considering buying a refurbished iPhone SE or comparing it to your current device, understanding the numbers is one thing, but feeling the scale is another.

  1. Height Comparison: Use a standard ruler. The iPhone SE (3rd Gen) is roughly the height of a standard ballpoint pen.
  2. Width and Reach: If you can comfortably wrap your hand around a 2.6-inch wide object, you can handle the SE with one hand.
  3. Depth: At 7.3 mm, the iPhone SE is roughly the thickness of five stacked credit cards.

Impact of Size on Daily Usage

The size of the iPhone SE influences more than just how it fits in your hand; it dictates the entire user experience.

One-Handed Typing

On the 4.7-inch screen, the keyboard occupies a significant portion of the lower half. For many, this is the most comfortable typing experience available. The "Reachability" feature (which slides the top of the screen down) is rarely even needed on this model because the top corners are accessible for most users without it.

Media and Gaming

This is where the size becomes a limitation. A 4.7-inch screen is small for competitive gaming or long-form movie watching. The 16:9 aspect ratio is classic, but modern 18:9 or 19.5:9 content will result in significant letterboxing or a very small image.

Battery Life vs. Size

One trade-off of the SE’s small size is the physical space available for the battery. The 3rd Gen SE uses a 2,018 mAh battery. In comparison, larger iPhones often carry batteries with 3,500 mAh to 4,500 mAh capacities. The smaller size inherently limits the "juice" available for heavy users.

How Big Are iPhone SE Cases?

When shopping for protection, it is vital to know that the iPhone 7, iPhone 8, iPhone SE (2nd Gen), and iPhone SE (3rd Gen) all share the exact same external dimensions. This means if you have an old iPhone 8 case, it will fit a 2022 iPhone SE perfectly.

However, the 1st Gen SE (2016) uses cases compatible only with the iPhone 5 and 5s. Do not attempt to buy a "Standard SE" case without checking the year, as the 2016 model is nearly an inch shorter than the 2022 version.

Frequently Asked Questions (FAQ)

What is the screen-to-body ratio of the iPhone SE 3?

The iPhone SE 3 has a screen-to-body ratio of approximately 65.4%. This is significantly lower than modern all-screen iPhones (which often exceed 85%) due to the large top and bottom bezels.

Is the iPhone SE the smallest iPhone ever?

No. The original iPhone, iPhone 3G, 3GS, 4, and 4S all had 3.5-inch screens, making them smaller than any SE model. However, the 1st Gen SE is the smallest "modern" iPhone that can still run relatively recent versions of iOS.

Does the iPhone SE (3rd Gen) fit in a pocket better than the Mini?

Actually, the iPhone 12 Mini and 13 Mini are physically smaller and shorter than the iPhone SE (3rd Gen), despite having larger 5.4-inch screens. This is because the Mini models lack the Home button and bezels.

How much does the iPhone SE weigh?

The 3rd Generation model weighs 144 grams (5.09 ounces). It is one of the lightest phones Apple has produced in the last decade.

Conclusion: A Legacy of Compact Design

The "bigness" of the iPhone SE is relative. In 2016, the 4-inch SE was considered tiny. By 2022, the 4.7-inch SE was considered the last of the compact dinosaurs. In 2025, now that the series has been discontinued in favor of the larger, all-screen iPhone 16e, the iPhone SE stands as a relic of a time when phones were designed to be operated with a single hand.

Whether you are looking at the 123.8 mm height of the original or the 138.4 mm height of the 3rd generation, the iPhone SE remains the gold standard for users who prioritize pocketability and lightweight design over massive screen real estate.