Guide to social media aspect ratios
Accepted aspect ratios for YouTube, Facebook and Instagram
Category

This was originally posted on the Peach website. Find out more about the rebrand from Peach to Cape.io.
You can now send ads directly to Facebook, Instagram and YouTube with Cape.io, in all the aspect ratios you need.
It makes sense to optimise your ads by serving them in formats that fill the maximum available space and won’t risk your content getting cropped - which can be different for different placements on each platform, and for different devices.
Peach now accepts multiple aspect ratios, to fulfill the demands of even the most ambitious social media campaigns (16:9 (landscape); 1:1 (square); 9:16, 3:4, 4:5 (portrait)). But with hundreds of possible iterations, making sure you’ve got the right aspect ratios and specifications can be complicated. We’ve put together a quick guide to recommended aspect ratios for YouTube, Facebook and Instagram, to ensure simple workflows and effective videos on social media.
Aspect ratios for Twitter
Twitter recommends videos in:
16:9
1:1
9:16
The following aspect ratios are also acceptable:
3:4
4:5
Peach won't make any changes to the creative: we don’t alter aspect ratios by cropping or stretching the video.
Aspect ratios for YouTube
16:9
9:16
Video content on YouTube is predominantly shown at a 16:9 ratio. This is the standard ratio for desktop and mobile, although the platform is now accepting 9:16 (i.e. portrait) formats specifically for viewing on mobile.
YouTube placements
YouTube supports six types of video ad placements. The most common are Trueview, pre-roll (or mid- or post-roll) and bumpers. Although you’ll need content to be 16:9 (or 9:16 for mobile) for all YouTube placements, you may want to optimise content and length.
Pre-roll, mid-roll or post-roll: ads that run before, during or after the selected video content. These can be skippable (i.e. Trueview) or non skippable.
Trueview: ads that viewers choose to watch. These can sit instream (i.e. before or during the video the viewer wants to watch starts) or are discovered as paid ads alongside other YouTube videos, in YouTube search results, or on external websites through the Google Display Network. You only pay when viewers either click on the ad, or watch more than 30 seconds of the ad.
Bumpers: 6-second unskippable video ads that play before a YouTube video starts. These are not skippable, but have to be concise!
Facebook and Instagram
Unlike YouTube, Facebook and Instagram accept many different aspect ratios, for a whole range of ad types across different placements. These include:
Newsfeeds
Instant Articles
In-stream video
Right column
Marketplace
Stories
(You can find more about placements at Facebook’s help centre here).
The same aspect ratios may work across different placements, and between mobile and desktop. However, ads served in aspect ratios other than the preferred option for each placement won’t be optimised.
In other words, ads formatted into the right aspect ratio for each destination get the most ad real estate on the screen, offer the best viewing experience, and ultimately see more effective conversions.
Aspect ratios for Facebook and Instagram
Facebook Ad Manager accepts the full suite of aspect ratios now available. This useful table shows aspect ratios used in the different experiences across Facebook, Instagram, and the Audience Network.
Facebook advise the following aspect ratios, all of which Peach supports (the following and more information on Facebook’s recommendations can be found in the Facebook Ad Manager):
On Facebook:
Video campaigns across both Facebook and Instagram: 4:5
Video ads on Facebook without links: full portrait (9:16), with the most important parts of the video visible within a 2:3 aspect ratio crop (this will be seen within the news feed on mobile).
News feeds
Video carousels: square (1:1).
Non-link ads: 16:9 up to 1:1.
360 video: 1:2 (full screen when clicked).
On Instagram:
Video ads on all feeds: Peach QCs videos in 1:1 and 4:5, both of which are supported on all Instagram feeds.
Video ads on Instagram Stories: full portrait (9:16)
On Audience Network
In-stream placement: 1:1 and full landscape (16:9).
TL:DR - the safest way to ensure optimised ads across Facebook and Instagram is to stick to an aspect ratio of 4:5. This won’t be perfectly optimised to every experience, but will be effective within most placements across both platforms.
You can read more about how Peach cuts the faff from delivering video ads to social media channels here.
For further aspect ratio advice, or to get started delivering flawless ads faff-free to your social channels, get in touch.
News
Stay ahead of the curve
Curious about the latest in marketing and advertising? Subscribe to our monthly Promarketers newsletter.

Jun 25, 2026
You don't have an AI problem. You have a trust problem.
Every marketer is being sold intelligence. But intelligence without accountability is just noise at scale. Here's what the real question actually is.

Jun 24, 2026
Why creative infrastructure is the real bottleneck in media orchestration
The disconnect between creative and media in programmatic advertising.

Jun 2, 2026
The new reality: Football marketing without FIFA rights
The 2026 World Cup is shaping up to be one of the biggest advertising moments of the decade. But for brands hoping to ride the wave of football fever, the line between “inspired by football” and “infringing on FIFA rights” has never been thinner. From unofficial sponsor campaigns to alcohol and gambling promotions, regulators and rights holders are watching closely. Here’s what marketers need to know before launching a football-themed campaign this summer.

May 26, 2026
How enterprises are actually adopting agentic AI
The shift to agentic AI isn't happening the way most vendors describe it. There's no cliff where enterprises suddenly ditch their AI wrappers and commit to full agent orchestration. Instead, they're moving through layers, testing frameworks with one team, keeping production systems stable on another.

May 26, 2026
Real-time ads in a regulated world
Understanding the real challenges of gambling & sports betting advertising in the US

May 8, 2026
Brazil votes. Cape.io already knows what that means.
Cape.io has powered Brazil's general elections for four editions, managing 500 channels and 155 million voters. Here's how we do it.

Apr 23, 2026
Agentic AI vs AI wrappers vs custom AI: How to choose your path
You're about to spend $500K on an AI initiative. You've got 3 options on the table, and they'll lead you to wildly different places. Pick wrong, and you're rebuilding in 18 months. Pick right, and you'll have a system that scales, costs less to maintain, and actually does what executives promised. The choice is between wrapping existing AI models, building custom AI solutions from scratch, or going agentic. Most teams don't understand the real trade-offs until they're locked into the wrong one.

Mar 30, 2026
Operationalizing AI in advertising: Why it must be embedded, not bolted on
Operationalizing AI in advertising isn’t about adding another tool to your stack. It’s about embedding intelligence into the systems that govern creative production, compliance, and delivery, so automation scales without creating more operational friction.

Mar 18, 2026
No more chocolate at breakfast? Navigating the new LHF ad rules this Easter
As ad compliance requirements evolve in 2026, UK confectionery brands face new restrictions on less healthy food (LHF) advertising. With the January 5 watershed now in effect, ad quality assurance systems must validate timing, placement, and product identifiability to avoid clearance failures this Easter season.

Mar 16, 2026
The future of inclusion: How Cape.io powered Virgin Media Television’s fully accessible ad break during the Men’s Six Nations
As Channel 4’s closed-captioning mandate came into effect in March 2026, Cape.io partnered with Virgin Media Television, Omnicom Media Group and VoiceBox to deliver a truly accessible ad break during the Guinness Men’s Six Nations. More than ad compliance, this moment proved that accessibility can operate at the highest level of live sports broadcasting.


