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Lumenan Studio

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.

Spin class pack

Spin class pack

Day pass

Day pass

Personal training

Personal training

Mobility workshop

Mobility workshop

Yoga retreat

Yoga retreat

Bootcamp

Bootcamp

4Cinematic hero banner

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

Feel at home in your gym

Pause or change your membership any time, with no long contracts.

5Map placeholder

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

Lumenan Studio239 Orchard Close, Edinburgh

6Custom 3:2 photo

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

The small habits that make a big difference
3:2 · Our favourite tips for busy weeks

7Portrait team cards

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

Samir Okafor

Samir Okafor

Product Designer

Leo Whitaker

Leo Whitaker

Operations Manager

Owen Brennan

Owen Brennan

Data Analyst

8Vertical stories

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

Story by Ivy QuinnIvy
Story by Isla FischerIsla
Story by Amara SatoAmara
Story by Ruby LindqvistRuby

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.

What our members asked us most
guide

What to eat before a morning workout

Sep 28, 2026

11Caption over a gradient

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

TorontoRecovery spa

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
Nutrition guide
Nutrition guide$27.99
Coaching plan
Coaching plan$215.00
Personal training
Personal training$66.00

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.

7:00New

Looking back at a busy season

3:58

Why recovery matters as much as training

6:55

Running your first 5K: an eight-week plan

17Media list

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

  • A beginner's guide to getting started

    Nov 4, 2025 · 9 min read

  • Building a workout habit that lasts

    Feb 24, 2026 · 9 min read

  • HIIT twice a week: how hard is hard enough?

    Sep 6, 2026 · 12 min read

18Responsive ratio

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

Move more, stress less

19Round avatars

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

Nadia Tanaka
Nadia
Felix Mensah
Felix
Finn Harlow
Finn
Tariq Silva
Tariq

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.