Spacebar dimensions: Are All Spacebars The Same Size?

Absolutely not! Keycap profiles vary widely, coming in many different shapes and sizes. This variety enables you to select the ideal keyboard based on your personal tastes. You might notice differences in height, width, and even how they are shaped. These variations not only affect the look of your keyboard but can also change how it feels when you type.

Standard spacebar sizes - How long is a spacebar?

Spacebars come in different sizes depending on the type of keyboard switches, like ALPS or Cherry MX. Their sizes are measured in "units" (U), with one unit being about 18 mm (0.71 inches). Here are 3 standard spacebar sizes:

Common spacebar sizes	Length	Typically found on
6u	108mm (4.25 inches)	Certain compact keyboards (60%, 65% keyboards) Custom keyboard layouts
6.25u	113mm (4.45 inches)	Standard ANSI keyboards ISO keyboards
7u	126mm (4.96 inches)	Custom mechanical keyboards Some ergonomic or split keyboards

6U

6U spacebars are a less common keyboard feature, typically measuring around 108mm (4.25 inches) in length. You’ll find them on custom or compact keyboard layouts such as 60% and some 65%. However, you might need to look for specific keycap sets or custom layouts supporting a 6U spacebar configuration. Check the specific keyboard model and layout from manufacturers to confirm compatibility with your spacebar size.

6.25U

The most common spacebar size is 6.25U, which is approximately 113mm (4.45 inches) in length. This size is typically found on standard ANSI and ISO keyboards. So what is the difference between ANSI vs ISO keyboard layouts? Visit our post for a helpful guide on the key distinctions between these two types of keyboards.

7U

A larger spacebar is often seen on custom mechanical keyboards and some ergonomic or split designs. This spacebar usually measures around 126mm (4.96 inches) long, providing extra room for your thumbs, and making typing more comfortable and efficient.

Spacebar sizes vary, which affects how keycaps fit your keyboard. Every keyboard is made differently, using various materials and printing styles. Our complete guide to different types of keycaps will help you understand these variations available simply!

Spacebar dimensions for ALPS switch keyboards

Spacebar dimensions	Length	Mounts
6.25u	N/A	N/A
6.5u	N/A	N/A
7u	133mm	3 mounts

Spacebar dimensions for Cherry MX switch keyboards

Spacebar dimensions	Length	Mounts
1.5u	28mm	1 mount
3u	57mm	3 mounts
4u	76mm	3 mounts
4.5u	85mm	3 mounts
5.5u	104.5mm	3 mounts
6u	114mm	3 mounts (57mm and 38mm apart)
	114mm	3 mounts (38mm apart)
	114mm	3 mounts (43.5mm apart)
6.25u	118mm	3 mounts (50mm apart)
	118mm	3 mounts (no center mount)
	118mm	3 mounts (40mm apart)
	118mm	3 mounts (42.5 mm apart)
	118mm	6 mounts
6.5u	123mm	3 mounts
7u	133mm	3 mounts (57mm apart)
	133mm	3 mounts (57mm and 42.8mm)
	133mm	3 mounts (55mm apart)
8u	152mm	3 mounts
9u	171mm	3 mounts
9.75u	185.25mm	3 mounts
10u	190mm	3 mounts

How to measure spacebar size?

To measure the size of your spacebar, you can start by checking your keyboard’s documentation or specifications. This should tell you the exact size of the spacebar and what type of stabilizer it uses. If you don’t have that handy, you can measure your current spacebar’s length with a ruler. Just note its length in millimeters or inches and then compare that measurement to standard spacebar sizes available online.

Factors to Consider Choosing Spacebar Sizes

Before you purchase new keyboard spacebar sizes, it's essential to make sure it’s compatible with your keyboard's layout, stabilizer type, and keycap profiles.

Keyboard’s size and layout

The spacebar usually measures 6.25 units, although this can vary. The term "usually" applies because the size of the keycaps can change depending on the keyboard's size, such as full-size, TKL, or 60%. Additionally, the keyboard's layout, like ANSI, ISO, or JIS, also affects the size of the keycaps.

ANSI, ISO, and JIS are the 3 main physical keyboard layouts used around the world. Now let's also see how these keyboard layouts will differ in their spacebar size:

ANSI, short for the American National Standards Institute, sets the standard keyboard layout mostly used worldwide. You have an ANSI keyboard layout if your enter key is horizontal and roughly 2.25 units wide. The spacebar usually measures either 6.25u, 6.5u, or 7.25u in length.

Meanwhile, ISO, or the International Organization for Standardization, has defined the more widely used layout in Europe. You have an ISO keyboard if your enter key is shaped like an upside-down thick L, covering two rows on the keyboard. In these layouts, spacebars are usually narrower than those in ANSI layouts, usually measuring around 6.25u.

The JIS (Japanese Industrial Standard) keyboard layout is similar to the ISO layout, featuring an L-shaped enter key. However, the main difference is the shorter spacebar such as 4.5u, which makes room for two extra keys used for typing in the native Japanese language. A typical JIS keyboard has 109 keys, offering 4 more than the ISO layout and 5 more than the ANSI layout. This layout is primarily found in Japan, which means there aren't many keycap options or models available for it.

Types of spacebar stabilizer

Stabilizers play a crucial role in how your keys feel and sound when you press them, especially larger keys like the spacebar. There are 3 primary types of stabilizers to be aware of.

• Cherry-style stabilizers: The most common, you’ll find them on many ANSI and ISO keyboards. They offer a balanced feel and are widely compatible with various keycap designs.
• Costar stabilizers: Less common and usually seen on older or custom mechanical keyboards. These require keycaps with specific stems to fit properly, so you’ll want to consider that when shopping.
• Optical stabilizers: Found on some newer keyboards, they use a light-based mechanism instead of a physical connection. Make sure to check if your keycap is compatible with these stabilizers before purchasing!

Types of spacebar profile 

Keycap profiles describe the shape of keycaps, including spacebars. These shapes influence how comfortable typing feels and how the keyboard looks. Here are some common keycap profiles:

• OEM: This is the most popular profile found on many prebuilt keyboards. It strikes a good balance between height and usability.
• Cherry: Similar to OEM but a bit shorter and with a curved surface. This profile is loved for its comfort and ease of use.
• SA: These are tall, spherical keycaps that offer a vintage style. They provide a unique tactile feel, making typing a pleasure.
• DSA: Featuring a uniform, low profile, and spherical top, DSA keycaps have a consistent feel across all keys, perfect for those who enjoy a minimalist look.
• XDA: Like DSA but with a larger surface area, XDA keycaps offer a comfy typing experience while still keeping a low profile.

To learn more about the various keycap profiles and their unique characteristics, check out our helpful guide on different keycap profiles. This guide provides comprehensive information to help you make informed decisions!

Additionally, while the material of a spacebar doesn't change its size, it can really influence its feel, sound and durability. So, what is the best keycap material? Explore our article to discover the pros and cons of different keycap materials and enhance your typing experience!

Top keycap manufacturers & their spacebar sizes

Beyond considering stabilizers, keyboard sizes and layouts, it’s also important to focus on the brands available. Many renowned brands offer high-quality spacebars and keycaps in different dimensions and materials. Let’s examine some of the leading spacebar brands and their size options in the table below: 

Brand	Common spacebar sizes	Keycap profile
HKKB	6u, 6.25u sizes	Topre profile
Corsair	6.5u size	Cherry, OEM
Signature Plastics	6.25u, 7u sizes	SA, DSA, and DCS
GMK	6.25u, 7u sizes	Cherry, OEM
Varmilo	6.25u	OEM
Tai-Hao	6.25u	OEM, Cubic
EnjoyPBT	6.25u, 7u	Cherry, OEM
Keyreative	6.25u, 7u	KAM, KAT

Besides the best brands we've mentioned, we've also included many other well-known options. This way, you can easily explore and choose from the best keycap manufacturers to find high-quality keycaps that suit your style and preferences!

Finding the right keycap brand depends on your unique needs and preferences regarding material, profile, and design. Let’s explore the options together and discover what fits your style best!

When choosing a keyboard, the spacebar size and profile can greatly affect your experience. If you prefer a soft, cushioned feel while typing, consider the HKKB with a 6u or 6.25u spacebar and Topre profile. On the other hand, if you’re a gamer who loves a more tactile sensation, go for a Corsair keyboard, which features a 6.5u spacebar and Cherry or OEM profile.

If you’re looking for high-profile, spherical keycaps, Signature Plastics is an excellent choice, offering a unique feel and look that stands out. For those who prefer the classic Cherry profile, GMK is renowned for its high-quality ABS keycaps. Both brands’ spacebars typically measure around 6.25u and 7u, making them compatible with many keyboards.

If you're leaning towards PBT keycaps with a sturdy build and vibrant colors, Varmilo is a fantastic option, especially for OEM profile keycaps featuring dye-sublimated legends. Tai-Hao provides affordable ABS and PBT keycaps in a range of colors, allowing you to pick a style that meets your budget. Both usually provide standard sizes like 6.25u spacebars.

For those specifically seeking high-quality PBT keycaps in the Cherry profile, EnjoyPBT is a solid recommendation, combining durability and aesthetics. Lastly, for those who want to venture into innovative designs, Keyreative is worth checking out, especially with their newer profiles like KAM and KAT that stand out for their unique shapes and engaging colors.

Where to find unique spacebar keycaps online?

If you’re on the hunt for unique spacebar keycaps, check out Hirosart for some amazing artisan options! Our keycaps are made using high-quality materials, making them stylish and durable. Each piece features vibrant colors and intricate designs, making your keyboard truly stand out. Our high-quality keyboards enhance your typing experience and add a personal touch to your setup, whether you're a gamer or simply a keyboard aficionado.

Take a look at our top spacebar sizes that showcase beautiful designs and high quality!

Products	Spacebar sizes	Prices
The Endurance Spacebar Ver 2	1u, 2.25u, 6.25u	$29.50
Final Fantasy keycap	1u, 1.25u, 1.5u, 1.75u, 2u, 2.25u, 2.75u, 6.25u	$29.50
Whale Shark Spacebar	6.25u	$59.99
Blue Katana Spacebar Keycap	6.25u, 6.5u, 7u	$69.00
Interstellar Spacebar Keycap	6.25u	$69.99
Dragon Ball Resin Spacebar Ver 2	6u, 6.25u, 6.5u, 7u	$129.00
Custom Spacebar Pokemon keycap	6u, 6.25u, 6.5u, 7u	$139.00
Totoro Spacebar	6u, 6.25u, 6.5u, 7u	$139.00
One Piece Spacebar	6u, 6.25u, 6.5u, 7u	$139.00

FAQs

What is the longest space bar length?

The longest spacebar length is 10u, which measures approximately 190mm (about 7.48 inches). This size is typically found on keyboards with Cherry MX switches, providing extra space for comfortable typing.

What is the shortest space bar length?

The shortest spacebar length is indeed 1u, which measures about 19mm (approximately 0.75 inches). This size is quite rare for spacebars, as they're usually longer, but 1u spacebars can be found in certain compact or custom keyboard layouts.

Why is the spacebar so big?

The space bar is big mainly due to its history. In the late 1800s, early typewriters had a metal bar that spanned the keyboard, which advanced the carriage without striking the typebars. Over time, this design evolved into the wide, centrally placed key we use today, making typing more ergonomic and user-friendly.

What are some mechanical keyboards with a short space bar?

Some mechanical keyboards, like the Filco Majestouch Minila Air, come with shorter space bars. The small design allows for a more simplified layout, making typing easier in limited space. These keyboards are ideal for those seeking a smaller size without losing functionality.