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Bloom Kit

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 --ui-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.

Clean water well

Clean water well

Tree planting

Tree planting

Emergency fund

Emergency fund

Teacher training

Teacher training

Shelter support

Shelter support

Vet care

Vet care

4Cinematic hero banner

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

Your kindness travels further than you think

Volunteers give their time in schools, shelters and food banks every week.

5Map placeholder

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

Bloom Kit180 Hillcrest Road, Toronto

6Custom 3:2 photo

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

How to choose the right campaign
3:2 · What happens after a disaster appeal

7Portrait team cards

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

Jonah Varga

Jonah Varga

QA Engineer

Maya Larsen

Maya Larsen

Support Specialist

Felix Ibrahim

Felix Ibrahim

Marketing Lead

8Vertical stories

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

Story by Omar DelgadoOmar
Story by Noah TanakaNoah
Story by Ruby CarterRuby
Story by Mason KimMason

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
insights

A day in the life of a volunteer

Oct 26, 2025

11Caption over a gradient

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

VancouverClean water

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
Clean water well
Clean water well$525.00
Vet care
Vet care$56.00
Library books
Library books$41.00

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.

8:25New

Inside the shelter: from rescue to new home

11:34

Our yearly impact report, explained

14:45

How your donations built three new classrooms

17Media list

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

  • Ten ways to fundraise with friends

    Aug 20, 2026 · 4 min read

  • Meet the partners behind our water projects

    Jul 24, 2026 · 10 min read

  • Looking back at a busy season

    Oct 22, 2025 · 3 min read

18Responsive ratio

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

Giving that you can see

19Round avatars

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

Diego Mensah
Diego
Ravi Fischer
Ravi
Lea Ortega
Lea
Ava Fischer
Ava

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.