Display · NaN (type foundry)

Rubik Bubbles

Q: Is Rubik Bubbles free for commercial use?

Yes. Rubik Bubbles is under the SIL Open Font License 1.1, which allows commercial use at any scale, logos, websites, apps and PDFs included.

Your words – they follow you round the site

Case

Size72 px

Weight400 RegularThe only weight it comes in

Letter spacing0 em

Line height1.10

Find the font. Find its kind.

CSSfont-family: 'Rubik Bubbles', sans-serif; font-weight: 400; font-style: normal; line-height: 1.1;

Rubik Bubbles is a free display font by NaN (type foundry) and Luke Prowse, on Google Fonts since 2022. Among the 554 display faces on FontKind, Rubik Bubbles has an average x-height, is wider than 76% and, at its regular weight, is darker than 94%. Its thickest strokes are 1.4 times its thinnest: moderate stroke contrast.

Compare with Lobular →Compare with another font

01 / Light table

Laid on top of Lobular

Rubik Bubbles on one light table with its two closest fonts, Lobular (79 out of 100) and Azabache (69). Lobular is 15% wider and 13% lighter, with an x-height 36% taller; Azabache is 21% narrower and 36% lighter, with less stroke contrast.

Layout

Letters

Show

Size auto

Ink shared with Rubik BubblesLobular…

Most different letters first; the figure is the share of ink the fonts have in common. Where the fonts agree the letters cancel to black: every white sliver is a real difference.

Open in the compare tool →

02 / Letters

The Rubik Bubbles alphabet

Capitals, lowercase, figures and signs · weight 400

Tap the letters you like, here and in other fonts, to find the fonts whose letters look most like them.

&
?
!
@
%
(
)

With this font

03 / Sizes

Rubik Bubbles at every size

1 weight (400) · six sizes, in your words

12 px
16 px
24 px
36 px
48 px
72 px

04 / Facts

Who made Rubik Bubbles, and can you use it?

Designer: NaN (type foundry), Luke Prowse
Kind: Display
Styles: 1 weight (400)
On Google Fonts since: 2022
Character sets: cyrillic, cyrillic-ext, hebrew, latin, latin-ext
Licence: SIL Open Font License 1.1

Can I use it?

Commercial use: Yes.
Logos: Yes.
Websites and apps: Yes. Self-hosted or loaded from Google Fonts.
PDFs and documents: Yes.
Changes: Yes.
Sharing the files: Yes, but not for sale. With the licence.

Rubik Bubbles is under the SIL Open Font License 1.1. This is a plain summary, not legal advice: the licence itself decides.

What each licence allows →

Read the licence

Already in your apps?

Google Docs: Most likely. Under More fonts, in Sheets and Slides too. Google’s guide
Word, PowerPoint: No. Install it from Google Fonts first. Microsoft’s list
Figma: Yes. Built in, nothing to install. Figma’s help
Canva: Not verified. Search its font menu for Rubik Bubbles, or upload it with Canva Pro. Canva’s help
Cricut: Once installed. Design Space lists Rubik Bubbles under System. Fonts for Cricut →

From each app’s own font list or help pages, read on 28 September 2026.

How each app gets its fonts →

Get Rubik Bubbles on Google Fonts

05 / Measurements

Rubik Bubbles, measured

Taken from the font file's own outlines, regular style

Hxgp in Rubik Bubbles. Lines at the measured heights, as a share of the em · The parts of a letter, named

x-height: 53.0% of the emlowercase x
Cap height: 72.9% of the emcapitals
x / cap: 0.73lowercase against capitals
Width: 61.2% of the emaverage lowercase
Ink: 78%letter box filled
Contrast: 1.35 : 1moderate stroke contrast

How we measure →

Where it stands among display faces

Ranked against all 554 display faces on FontKind

x-heightNear the middle of display faces
WidthWider than 76% of display faces
InkDarker than 94% of display faces
ContrastNear the middle of display faces

06 / Similar fonts

Fonts similar to Rubik Bubbles

Matched letter by letter · its own family apart

All 100 fonts similar to Rubik Bubbles →Compare side by side →Get Rubik Bubbles on Google Fonts

07 / Swap

Swap Rubik Bubbles without a jump

Running text within 3% of the width, x-height within 5%

None of the fonts that look most like Rubik Bubbles sets text to its width and x-height: a swap would move lines.

Fallback while it loads

Until Rubik Bubbles loads, this sets Arial in its place at 119.6% of its size, so running text keeps Rubik Bubbles’s width and lines keep their height: nothing moves when it arrives.

@font-face {
  font-family: 'Rubik Bubbles Fallback';
  src: local('Arial');
  size-adjust: 119.63%;
  ascent-override: 78.16%;
  descent-override: 20.90%;
  line-gap-override: 0.00%;
}

font-family: 'Rubik Bubbles', 'Rubik Bubbles Fallback', sans-serif;

08 / Questions

Questions about Rubik Bubbles

Answered from its licence, Google Fonts and each app’s own font list

Is Rubik Bubbles free for commercial use?

Yes. Rubik Bubbles is under the SIL Open Font License 1.1 , which allows commercial use at any scale, logos, websites, apps and PDFs included.

How do I download and install Rubik Bubbles?

FontKind doesn’t host Rubik Bubbles’s files: it comes free from Google Fonts . On its page there, choose Get font, then Download all, and unzip the file. It holds a single font file. On Windows or a Mac, double-click each font file and choose Install, then restart any app that was open, Word included.

Is Rubik Bubbles in Microsoft Word?

Not until you install it: Rubik Bubbles isn’t one of Microsoft 365’s cloud fonts. Installed, it is in Word’s font menu and PowerPoint’s. For someone who hasn’t installed it, turn on Embed fonts in the file in Word’s save options: its licence allows that.

Is Rubik Bubbles in Google Docs?

Most likely. Search for Rubik Bubbles under More fonts in the font menu of Docs; added there, it is in Sheets and Slides too.

Is Rubik Bubbles in Figma?

Yes: Rubik Bubbles is in Figma’s font menu, in the browser and the desktop app, with nothing to install.

How many weights does Rubik Bubbles have?

Rubik Bubbles comes in one weight, Regular (400). Ask for bold and most apps thicken the letters themselves: a faux bold, not a drawn one.

Who designed Rubik Bubbles?

Rubik Bubbles was designed by NaN (type foundry) and Luke Prowse. It has been on Google Fonts since February 2022. NaN (type foundry) also made Unbounded.

What fonts are similar to Rubik Bubbles?

The closest in our letter-by-letter match are Lobular (79), Azabache (69) and Creepster (66), out of 100. Next to Rubik Bubbles, Lobular is 15% wider and 13% lighter, with an x-height 36% taller. Its own family, listed apart, adds Rubik Gemstones, Rubik Beastly, Rubik Puddles and 24 more. See all 100 fonts like Rubik Bubbles.