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The Designer’s Guide to Letter-Spacing

Most of the information we consume happens through reading, so it makes a lot of sense to pay attention to the words when designing. There are many aspects to typography, but one of the things that helped improve the quality of my design was letter-spacing.

Letter-spacing is about adding and removing space between letters. Some people confuse it with kerning, but these two are different; letter-spacing affects the whole line of text, whereas kerning adjusts the space between two individual letters at the time. Kerning is best left to type designers, besides which, unlike letter-spacing there is currently no way to control kerning in CSS.

I believe that practice and a lot of observation will change the way you treat letter-spacing in your work as well.

The Purpose of Letter-Spacing

The main purpose of letter-spacing is to improve the legibility and readability of the text. Words act differently depending on their size, color, and the background they are on. By adjusting letter-spacing to the environment you are working with you will help readers consume your information faster, and more efficiently. The fun part is that they won’t even notice it — that’s the whole point of the job.

Bear in mind that typographers think about letter-spacing and kerning when designing a typeface. It means you don’t have to apply it to all your text, but in order to have an understanding when it’s necessary, you should know some basic principles, and use good typefaces.

How Letter-Spacing Affects Legibility and Readability

The legibility and readability of your text depend on things like line-height, paragraph length, font size, typeface choice, letter-spacing, and much more. Regarding letter-spacing, if you are just getting into typography, the best thing you can do is not overuse it. What I mean by that is simply don’t make the distance between letters too big or too small; even if you think it looks good, people will struggle reading it, and that will ruin their experience.

Letter-Spacing Capital Letters

Capital letters are designed with the intention that they will appear at the beginning of a sentence or proper noun, in combination with lowercase letters. When capital letters are next to each other, the space between them is too tight. So in order to achieve better readability, space needs to be increased. This applies to both large and small font sizes.

Letter-Spacing Headlines

If you are using well designed fonts, you can be sure that they are calibrated well, and you won’t need to make any major adjustments to them. However, the problem with headlines is that at larger scales the space between letters looks unbalanced. It can be fixed by increasing or decreasing the letter-spacing value.

There are no strict rules for letter-spacing — there are a lot of typefaces and all of them require an individual approach — but if you look at how big companies like Google and Apple treat their typefaces, you can find a lot of valuable information there.

Let’s take a look at the “Roboto” and “San Francisco” typefaces (the first one is used in Material Design and the second one in Apple’s ecosystem). Headlines from 20 to 48 pixels have either a positive letter-spacing value or none. If the font size is bigger, letter-spacing becomes negative. These exact numbers are not going to work that well for other typefaces, but after trying different approaches I can state that it’s a common pattern.

I’ve tested several guidelines for letter-spacing and the one that was published by Bazen Agency works for a lot of popular typefaces. It will be a good starting point for you, but you can always apply additional adjustments:

  • H1 — 96px — -1.5%
  • H2 — 60px — -0.5%
  • H3 — 48px — 0%
  • H4 — 34px — 0.25%
  • H5 — 24px — 0%
  • H6 — 20px — 0.15%
  • Subtitle — 16px — 0.15%

If you happen to design a lot of apps or you’re planning to do that, one thing that helps me is using the default Material Design and Apple guidelines for their typefaces. They are well balanced and it saves a lot of time.

Letter-Spacing Body Text

If you ever read anything about letter-spacing, you’ve probably have seen this popular wisdom from typographer Frederic Goudy: “Anyone who would letter-space lowercase would steal sheep”. (There’s an argument that he was only referring to blackletter fonts.) Some designers took it as a hard rule and now never adjust the letter-spacing of lowercase text.

Based on my practice and by looking at the work of designers I can’t agree with Goudy, because sometimes small changes can make a big difference in how your text performs. Let’s take, for example, condensed fonts. At a small size, the letters are too close to each other, which leads to poor legibility. By increasing letter-spacing by 1.5% you will see that the text is now easier to read.

If we look at my previous example, in the guidelines for “Roboto” and “San Francisco” typefaces, letter-spacing is applied to body text; even though San Francisco has a dedicated “SF Pro Display” for headlines and “SF Pro Text” for body text, letter-spacing is still used to refine them.

There are a lot of different typefaces and a single rule doesn’t apply to all of them. Experiment with letter-spacing and do what seems right to you. There are some simple guidelines that will lead you in the right direction, especially when working with body text:

Keep in Mind Line-Height

If you have a line-height greater than 120%, most likely negative letter-spacing will lead to an unbalanced look to the paragraph. To refine it you would need to either keep it at 0% or only slightly increase it.

Light Text on Dark Background

On a dark background, white text looks overexposed and therefore letters appear too tight. To make it more legible, I would suggest you increasing letter-spacing a small amount.

General Values for Body Text

You can use the following guidelines for body text, which I have tested with several typefaces:

  • Body 1 — 16px — 0.5%
  • Body 2 — 14px — 0.25%

Letter-Spacing Captions

Unlike headlines and body text, smaller font sizes don’t have many variations in letter-spacing. It’s a common practice when a font size is lower than 13px to increase the space between letters to make it legible. But there are always exceptions (“SF Pro Text” guidelines suggest using positive letter-spacing only when a font size is 11px or below). Make sure you experiment with settings.

You can use the following values as a starting point and then edit them to what seems right to the typeface of your choice:

  • Caption — 12px — 0.5%
  • Overline — 10px — 1.5%

Final Tip

One of the things that helped me improve my skills in typography was looking at other designers and especially type foundries. By decoding their work you might notice some nuances of how they treat typography and it will help you in future projects.

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Show Them Your Assets – Tips for Handing Off Designs to Developers

You’ve been working away at your latest design project, and the client has given the go-ahead on your lovingly created digital concepts. Now it’s time to bring those designs to life, and you have a developer queued up to do just that.

So your part’s done, right? Not quite. You’re going to want to make sure your developer has the best head start they can in order to create the site as you imagined.

Below are a few tips to make that handover process a little easier.

Communicate to Make It Great

Get Talking

Scheduling a face-to-face meeting with your developer to talk over your project’s specifics and ambitions will help align your expectations and make the intent behind your concepts more clear. It’s quite likely they’ll even ask questions and request assets you haven’t even thought of yet!

It’s not just a one-and-done thing either, your developer’s going to have questions or requirements that arise as the project progresses. Deciding on a communication channel to allow easy discussion will help you both immensely.

Annotating Your Concepts

Developers might seem like magicians with the way they bring your websites to life, but they’re not clairvoyant! Annotating your concepts where advanced functionality is required reduces ambiguity and makes it more likely that your cool, quirky idea is going to make it to production. If it’s a feature that’s particularly unusual, you might want to find an example of a website or code sandbox that does something similar.

An example of Figma’s comment tool in use to make developer notes.

Figma and Sketch both have comment functionality in order to make annotations a little easier, also allowing multiple parties to comment. If dealing with PDFs, there is also an annotation tool available through Adobe Acrobat.

Specify the Basics

The basis of modern front end development revolves around DRY thinking. Some might argue thinking about code can be pretty dry, but we’re not talking about that – in this case, DRY stands for Don’t Repeat Yourself.  Most developers will tackle a project by starting with defining variables: what colors, font sizes, grid columns… anything that can be reused! Good, consistent design follows this same principle – although it’s a habit that can be hard to get going at first.

Tip: It’s always easier to define variables if this mentality is approached towards the start of the project!  

Colors

Make a style guide that specifies the colors you’ve used in your designs. Think about their logical applications to help signpost how they might work as a variable – for example, what colors did you use for paragraph text, hyperlinks and backgrounds? Did you consider colors to convey status messaging, such as successes, warnings and errors?

Typefaces

Which fonts have you used for your project? Is there a consistent set of font sizes you used throughout? If you haven’t already, maybe consider a ratio-based type scale – I like to use ModularScale to help with this.

Basic HTML Elements

Think about general styling for these basic html tags:

  • Paragraphs <p>
  • Headings <h1–h6>
  • Bullet lists <ul> and numbered lists <ol>
  • Emphasized text <b>, <strong> and <em>

Buttons

How about buttons and links? What should they do when they’re hovered over, focused (using the tab key on a keyboard) or disabled?

Forms Fields and Inputs

What should form fields look like? Is there any validation checking that should occur when a form is submitted?  How about checkboxes and radio buttons?

It’s unlikely that you’re going to be able to cover absolutely every single eventuality – allow your developer to use some common sense to fill in the gaps, and be available to them if they have any questions. In the words of John Maxwell and your aunt’s home office wall sticker, teamwork makes the dream work.

Get Your Favic-on

Favicons are widely recognized as the small icon that appears to the left of the site title on your browser’s tab bar. Nowadays, the application of your site’s favicon is much further reaching, showing up in Google search results and app tiles. There’s also extra theming options available, such as the ability to customize the color of Google Chrome Android’s browser bar color for your site.

Using a generator site such as realfavicongenerator takes the pain out of much of this decision-making, allowing you to upload specific graphics as desired, creating silhouettes of your icon for Windows Metro tiles and macOS Safari pins, and packaging everything into easy-to-use files and code.

 Compress Your Images

Nobody wants to load a 20MB image when they’re on a slow connection or a data plan – it pays dividends to plan ahead and downsize your images so that they’re production-ready for the web. If you’re worried image compression is going to harm your image quality, fear not – you can go a long way with image compression before quality is seriously compromised.

  1. Start by reducing the image resolution – for batch jobs, I use Adobe Photoshop’s image processor script to downsize images to fit 1920 x 1200 pixels
  2. Alternatively, if you’re working on a static project – where specific images will be used only in specific places – you could use your design software (nearly all mainstream UI software allows you to do this now) to export your images at 2x size to support devices with high pixel densities.
  3. I also convert my image color profiles to SRGB to ensure consistency across most modern display types (this one’s optional)
  4. I then take my newly downsized images and run them through imageOptim at 80% quality. Generally I would aim to get my images under 300kb – if there are any that are still significantly over this target once compressed, I’d run these through again at 70% quality (I wouldn’t recommend going lower than this, though).

Don’t forget you can also do this for PNGs! Enabling PNGCrush in imageOptim will let you significantly reduce the size of PNGs… just be ready for it to take a while.

Make Your Vectors SVG-Easy to Use

If your design contains graphics or illustrations you created using vector software, it can be used on the web as an SVG file. Usually, these files will be a lot smaller than JPGs or PNGs. You can export graphics in most (if not all) vector software in this format.

Optionally, you could use imageOptim or SVGOMG to compress the SVG code without sacrificing quality. Your developer might already use a script that does this automatically when processing the site for production, so it may be worth asking ahead.

Get Your Licenses in Check

If you’re using premium fonts, make sure you’ve purchased a webfont license so you can hand over the correct files to the developer. I’d recommend doing this sooner rather than later – although not often, occasionally web versions of fonts can have slightly different bounding boxes to their desktop counterparts, making it a real pain for developers to work with further down the line.

If you’ve been using samples of stock photos (or if you’ve been going crazy lifting whatever you can find on Google Images), make sure everything is kosher before you go live. Make sure you purchase licensed photos, and if certain photos you want to use require attribution, make the developer aware of this.

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p img {display:inline-block; margin-right:10px;}
.alignleft {float:left;}
p.showcase {clear:both;}
body#browserfriendly p, body#podcast p, div#emailbody p{margin:0;}

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