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Iris Hub

Ratio

The ratio helper keeps a box at a fixed aspect ratio whatever its width, which is perfect for media placeholders, thumbnails, galleries and banners. Pick ratio-1x1, ratio-4x3, ratio-16x9 or ratio-21x9, or set any ratio with the --bs-aspect-ratio variable.

1The four built-in ratios

ratio-1x1, ratio-4x3, ratio-16x9 and ratio-21x9 next to each other, filled with a plain div.

1:1
4:3
16:9
21:9

2Video placeholder

A 16:9 poster image with a centred play button, ready for a video player of your choice.

Video poster

3Square product thumbnails

ratio-1x1 with object-fit-cover gives every product the same tile, whatever the photo size.

Slow-cooked lamb

Slow-cooked lamb

Espresso martini

Espresso martini

Chocolate tart

Chocolate tart

Chef's tasting plate

Chef's tasting plate

Garden salad

Garden salad

Burrata with tomatoes

Burrata with tomatoes

4Cinematic hero banner

ratio-21x9 for a wide banner with a headline overlay.

Seasonal menus from local farms

Vegan, vegetarian and gluten-free dishes are marked clearly on every menu.

5Map placeholder

A 4:3 box reserved for a map, showing the address until the map loads.

Iris Hub84 Hillcrest Road, Kyoto

6Custom 3:2 photo

Any ratio works with the --bs-aspect-ratio variable: 2 / 3 = 66.67% for classic photo prints.

Our chef's guide to seasonal autumn produce
3:2 · What is new on our winter menu

7Portrait team cards

A 3:4 portrait ratio (133.33%) for team photos in cards.

Nora Novak

Nora Novak

Support Specialist

Owen Haddad

Owen Haddad

Project Manager

Tariq Fischer

Tariq Fischer

Support Specialist

8Vertical stories

A 9:16 ratio (177.78%) for phone sized stories or short clips in a scrolling row.

Story by Zoe QuinnZoe
Story by Lea CarterLea
Story by Elena AlvarezElena
Story by Ivy MoreauIvy

9Chart area

A 16:9 box that keeps a simple bar chart in proportion on every screen.

Monthly bookings

10Blog card cover

ratio-16x9 as a card image keeps every post card in a grid the same height.

Our favourite tips for busy weeks
tutorial

Five things we learned this year

Jun 5, 2026

11Caption over a gradient

A 4:3 image with a gradient overlay so white caption text stays readable.

DublinWine pairing

12Mixed ratio gallery

Combining 1:1, 4:3 and 16:9 tiles in one responsive grid.

Gallery photo 1
Gallery photo 2
Gallery photo 3
Gallery photo 4

13Thumbnails in table cells

A small ratio-1x1 box keeps order line images square inside a table.

ImageItemPrice
Grilled salmon
Grilled salmon$24.99
Truffle pasta
Truffle pasta$24.00
Garden salad
Garden salad$11.00

14Empty cover placeholder

A dashed 4:3 area that reserves space for an image that has not been chosen yet.

No cover image yet

15Colour swatches

Empty square ratios make perfect colour swatches for a style guide.

primary

primary

secondary

secondary

success

success

info

info

warning

warning

danger

danger

16Video thumbnails with badges

Duration and status badges positioned over 16:9 thumbnails.

10:31New

Three pasta shapes to make at home

10:34

How we make our sourdough every morning

10:59

How to choose the right dish

17Media list

Fixed width 4:3 thumbnails beside article titles in a reading list.

  • Five wines to pair with a summer dinner

    Sep 26, 2025 · 6 min read

  • Meet the farmers behind our menu

    Mar 15, 2026 · 12 min read

  • A beginner's guide to getting started

    Jan 13, 2026 · 4 min read

18Responsive ratio

A small custom class changes --bs-aspect-ratio per breakpoint: square on phones, 21:9 on tablets and up.

Simple dishes, honest ingredients

19Round avatars

ratio-1x1 with rounded-circle keeps profile pictures perfectly round even when the source is not square.

Felix Morgan
Felix
Mason Hughes
Mason
Ethan Kim
Ethan
Priya Harlow
Priya

20Loading skeleton

A 16:9 placeholder block with placeholder-glow while the real image and text load.

The skeleton reserves the exact space, so the page does not jump when content arrives.