01
Which shape performs better?
Vertical, on any feed designed around it, because occupying the entire screen removes everything competing for attention. Square earns its place when one clip has to serve a vertical feed and an in feed post at once, where the vertical version would be cropped awkwardly in the second.
02
Where each placement wants which
Square earns its place when one file has to serve several placements, which is a scheduling decision rather than a design one.
| Placement | Best shape | Square acceptable? |
|---|---|---|
| TikTok | 9:16 | Yes, smaller on screen |
| Reels and Shorts | 9:16 | Yes, smaller on screen |
| In feed post | 4:5 or 1:1 | Yes, this is its home |
| 1:1 or 4:5 | Yes | |
| One clip for everywhere | 9:16, or 1:1 as a compromise | This is the case for square |
03
When vertical is clearly right
On feeds built for full-screen vertical viewing, 9:16 fills the whole display and removes distractions. For talking-head clips, personal stories and anything centred on one person, vertical usually performs best there.
Most short-video apps are designed around this shape.
04
When square makes sense
Square suits clips that will appear in mixed placements, such as feeds that show posts at different sizes, websites and messaging apps. It also suits content where width matters, like a screen share or a group scene.
One square clip can work acceptably in many places.
05
The 4:5 compromise
4:5 is taller than square and fills much of a phone screen in feeds that support it, while keeping more width than 9:16. It is a popular choice for in-feed posts.
Test it where your audience spends time.
06
Producing both
When a clip is important and will be posted widely, producing both a vertical and a square version lets each fit its destination. The extra effort is small once the moment is chosen.
Label files by shape to avoid mix-ups.
07
Placing words for each shape
Text positions differ between shapes. Vertical clips need text clear of app buttons at the bottom; square clips have less vertical space for text. Check each on a phone.
Save separate positions for each shape.
08
Measuring the difference
Compare the same clip in different shapes on the same platform over time if you can. Look at retention and shares rather than views alone.
Let your results decide your default.
09
A month-long comparison plan
Pick ten clips and produce each in both shapes. Post the tall version on the short-video feeds and the square version in in-feed placements, then compare average watch percentage and shares after a week. Ten pairs are enough to see whether one shape clearly wins for your content.
Keep the words and openings identical so only the shape differs.
10
Fill the screen where you can
- Use vertical where the feed is vertical. The screen filling advantage is real and large.
- Use square when one file serves several placements. It is a scheduling decision more than a design one.
- Consider running twice instead. The same recording can produce both shapes.
Run one recording in two shapes and compare.
Questions people ask
- Does square get less reach on a vertical feed?
- It occupies less of the screen, which generally costs some attention. How much depends on how strong the clip is.
- When is square clearly better?
- When the footage cannot afford to lose the width, or when one clip is going to placements with different shapes.
- What about 4:5?
- It sits between them, keeping more width than vertical while still taking most of a phone screen. It is on every plan.
- Do I have to choose one?
- No. Running the same recording twice produces both, and pricing does not change with shape.
- Which is safest if I post everywhere?
- Vertical for the vertical feeds and a second run in 4:5 or 1:1 for in feed posts.