Why is the Spacebar So Big? Is It A Waste Of Space?

  • Keycaps 101
  • Posted by: amy-golden
  • Aug 16, 2024

The spacebar, the longest key at the bottom of standard keyboards, measures about 6u to 9u. But why is the spacebar so big?

This generous size is a smart design that supports ergonomic typing and efficient word separation or quick action in-game. The larger surface also distributes the force of repeated pressing, giving your fingers a much-needed rest.

It's big for all the right reasons! Now, let's explore the different sizes of spacebars and uncover the reasons why the space bar is so big on the keyboard.

Popular Sizes of Spacebars

The spacebar, being one of the most heavily used keys on a keyboard, is designed to be larger. Spacebar sizes differ to accommodate different keyboard layouts and user typing preferences, typically ranging from 6u to 9u in keyboard unit measurements.

Sppacebar size Length Features and applications
6u 114mm

(4.49 inches)

  • Ideal for compact keyboards (60% and some 65%)
  •  Sleek, minimalistic design
6.25u 118mm

(4.65 inches)

  • Standard for most mechanical keyboards (full-size, TKL, compact)
  •  Comfortable thumb use
6.5u 123mm

(4.84 inches)

  • Common in custom builds
  • Extra space without bulk
7u 133mm

(5.24 inches)

  • Popular for full-size keyboards, many 75% layouts, and custom builds
  •  Ample space for easy typing
8u 152mm

(5.98 inches)

  • Used in specialty and custom keyboards
  •  Wide area for gaming and heavy typing
9u 171mm

(6.73 inches)

  • Found in very large or custom keyboards
  • Extra-wide for ultimate comfort and accessibility

Finding the right spacebar size for your keyboard can be a bit of a puzzle. If that's the case, you'll need a ​​handy guide to spacebar dimensions to help you out.

Alright, time to know why is the spacebar so big!

Practical Reasons for the Space Bar's Size

Why is the spacebar on my keyboard so big when compared to the other keys? Here are 6 main reasons why the spacebar is so big.

High Frequency of Use

The primary reason why the space bar on the keyboard so long is all about keeping up with its busy schedule. It is one of the most frequently pressed keys, used to insert spaces between words whether you're drafting an email, writing a report, or chatting online.

In essence, the size of the spacebar is directly linked to its function as a high-use key. Its larger size ensures it's easy to locate and press, reducing errors and keeping your typing flow smooth and uninterrupted. Plus, when typing fast, having a big spacebar ensures you can press it quickly and frequently without missing a beat.

Why is the spacebar so big (source: hirosart)
Why is the spacebar so big (source: hirosart)

Ergonomics and Accuracy

The most important explanation for why the spacebar so big is to enhance ergonomics and accuracy.

Ergonomically speaking, a large and more accessible spacebar is like a comfortable cushion for your thumb, letting it rest and press without any strain. This means less muscle fatigue during those long typing sessions.

Moreover, with more surfaces to work with, you can press the spacebar with less precision, just give it a tap, and you're good to go even if your thumb isn’t perfectly centered! Thus, those minimize typing errors and boost your speed.

The spacebar is large to boost ergonomics and accuracy (source: kiibo studio)
The spacebar is large to boost ergonomics and accuracy (source: kiibo studio)

Reduced Accidental Keypresses

The space bar serves as a buffer zone between frequently used keys like "Ctrl" and "Alt". When you’re typing fast, it’s easy to accidentally hit the adjacent keys if the spacebar is too small.

However, a bigger spacebar can create a clear target area which helps minimize accidental keystrokes on nearby keys, which can occur with smaller keys, thus reducing typing errors and improving overall typing speed. This design feature is a lifesaver for speedy typists or anyone who doesn't always hit the center of the key!

A bigger spacebar can minimize accidental keystrokes (source: eurekalert)
A bigger spacebar can minimize accidental keystrokes (source: eurekalert)

Accommodation for Different Typing Styles

People type in different ways. Some use their thumbs predominantly, while others use different fingers or both thumbs. This also explains why is the spacebar so big. Thankfully, a larger spacebar accommodates various typing styles, enhancing its versatility for different users.

For touch typists relying on muscle memory and rarely looking at the keyboard, the broad surface allows for consistent, accurate presses without adjusting hand positioning. Even non-touch typists benefit from the larger size, as it provides a margin of error for key targeting. Plus, for those who switch up their typing styles or keyboards, the spacious spacebar offers a familiar, reliable key, boosting user-friendliness and comfort for all.

Touch typing vs hunt-and-peck typing (source: istock)
Touch typing vs hunt-and-peck typing (source: istock)

Versatility for Different Hand Sizes

Besides accommodating different typing styles, a wider spacebar also caters to all hand sizes. Whether your hands are small or large, the spacebar should ensure that everyone can press it without straining their fingers or awkwardly adjusting their hand position.

For people with smaller hands, a big spacebar means they can reach and press it comfortably, reducing the risk of finger strain or fatigue. For those with larger hands, the extra surface area provides plenty of room for thumb presses, preventing accidental keypresses and improving typing accuracy.

A wider spacebar accommodates all hand sizes (source: geekhack)
A wider spacebar accommodates all hand sizes (source: geekhack)

Got big hands? Check out our top-rated keyboards for large hands. These could be just what you need! Conversely, if you're struggling with a bulky keyboard? Check out our top picks for keyboards designed for smaller hands!

Application of Fitts’s Law

Fitts’s Law, a model used in human-computer interaction and ergonomics, describes the time required to move to a target based on its distance and size. This law helps justify why the spacebar is so big.

According to Fitts’s Law, a larger target (the spacebar) can be hit more quickly and accurately because the user doesn’t need to be as precise with their movements. By giving you a bigger target, the spacebar reduces the cognitive load and physical effort needed to find and press it, making typing smoother and more efficient.

Fitts’s law states that a larger spacebar can be pressed faster and more accurately (source: vgn)
Fitts’s law states that a larger spacebar can be pressed faster and more accurately (source: vgn)

And there you have it! That's all reasons “Why is the spacebar so big?”. Now, let's take a journey through its history and see how its size has evolved.

Historical Evolution of Size of Spacebar

From old-fashioned typewriters to modern keyboards, the spacebar has come a long way. Its path to becoming such an important key started with the invention of the typewriter in the mid-19th century. Let’s take a look at its historical evolution and discover why the spacebar is so big over time!

Development of typewriters and early keyboards

The spacebar's story kicks off in the late 19th century with the first typewriters, which had a mechanical mechanism for advancing the paper.

These early typewriters were mechanical marvels, with each key assigned to a single letter or symbol. The spacebar was introduced as a crucial element for creating spaces between words, a necessity for readable text.

Back in the late 19th century, on the first typewriters, the "bar" was literally a metal bar stretching across the entire width of the keyboard (and sometimes even around it). Pressing it would move the carriage forward without activating any of the typebars to hit the paper.

As such, the answer for “why is the spacebar so big” can be traced back to its historical design.

First practical typewriting machine in 1866 (source: the buffalo history museum)
First practical typewriting machine in 1866 (source: the buffalo history museum)

Influence of mechanical typewriters on space bar size

As typewriters evolved, so did the spacebar size. Over time, the spacebar by the early 20th century has slimmed down from a big metal bar into the ergonomic key we’re all familiar with. As keyboards got more function keys and a bit of style, the spacebar settled into its spot in the center, usually between the Alt keys (or Command keys on a Mac) and below the C, V, B, N, and M keys on a standard QWERTY keyboard. Of course, the exact placement can vary depending on the keyboard design.

This shift was from the era of monospaced typewriters, where each character took up the same width, to proportional spacing, which needed more room between words.

Olivetti valentine typewriter manufactured in 1970 (source: typewriter 101)
Olivetti valentine typewriter manufactured in 1970 (source: typewriter 101)

Transition to computer keyboards and the retention of space bar size

The transition from typewriters to computer keyboards in the latter half of the 20th century brought many technological updates, but the spacebar’s size stayed pretty much the same.

Early computer keyboards, such as those used with mainframes and early personal computers, kept the generously sized spacebar from their typewriter predecessors. This was because the larger spacebar had already proven its ergonomic benefits and users were accustomed to it.

Ibm ps/2 model 25 keyboard released in 1987 (source: reddit)
Ibm ps/2 model 25 keyboard released in 1987 (source: reddit)

Fast forward to today, whether you're using mechanical, membrane, or chiclet keyboards, most spacebar remains big. However, some special keyboard layouts like the Japanese ones, split mechanical keyboards, or custom builds, don't need much "space" at all! They feature a smaller spacebar since the space character isn't used as frequently or due to aesthetic purposes. Who knew space could be so compact?

Keyboards with smaller spacebars (source: matt3o aliexpress)
Keyboards with smaller spacebars (source: matt3o aliexpress)

Despite all the tech advancements and layout changes, the spacebar’s size still highlights its long-standing role in typing efficiency. The age-old question of  why is the spacebar so big has a clear answer now. It keeps our thumbs happy and our typing efficient!

Conclusion

The reasons why is the spacebar so big are rooted in its thoughtful and practical design and historical evolution. It’s been carefully crafted to make typing easier and more efficient. From old typewriters to modern keyboards, the spacebar has grown to improve typing speed, accuracy, and comfort. Its size helps accommodate all hand sizes and typing styles and makes each keypress smoother.

So next time you use your keyboard, remember that the spacebar’s size is a key part of what makes typing better.

Want to give your keyboard a unique twist? The collection of artisan spacebar keycaps is waiting for you to explore!

Artisan spacebar keycaps (source: hirosart)
Artisan spacebar keycaps (source: hirosart)

FAQs

Does the size of the space bar affect typing speed?

Yes. The most common spacebar size is 6.25U (about  4.45 inches). A big space bar can positively impact typing speed by creating a wider target area. This means fewer missed presses, fewer errors, and smoother typing, especially during fast typing.

Can the space bar be customized or resized?

Yes. Many mechanical keyboards allow for spacebar customization or resizing. You can choose different styles, colors, and sizes of space bars to fit your personal tastes. You can even split the space bar with equal-sized symmetrical halves.

Can the space bar be adjusted for individuals with different hand sizes?

No. However, while you can’t tweak the space bar itself, choosing a keyboard with a generously sized space bar can make typing comfy for any hand size. Larger space bars are generally more comfortable for various hand sizes, reducing strain and improving ease of use.

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Author

I work as a freelance blogger in Seattle, Washington. I've been freelancing full-time for 5 years. I'm interested in anime, resin art, and mechanical keyboards.

amy-golden

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