Social media video sizes: 8 platforms in one table

Vertical 9:16, such as 1080×1920, is the video shape most social platforms share: TikTok ads, Instagram Reels, Stories, and Feed ads, Snapchat ads, X ads, and Pinterest all list or recommend it, YouTube Shorts takes vertical video, and it sits inside LinkedIn's range. The exceptions are Facebook Feed ads, where Meta recommends 4:5 at 1440×1800, and regular YouTube videos, which are 16:9 on a computer. So a 9:16 master plus a 4:5 and a 16:9 cut gives every platform below a shape it lists. Today every Sume video model that lists aspect ratios makes 9:16 and 16:9, and most make 1:1; 4:5 comes from a Timeline 1.0 render that crops a vertical clip.

Each platform's figures are quoted from its own page, linked in the table, read on 2026-09-28; platforms can change them. TikTok, Meta, Snapchat, and X figures are ad specs; YouTube and LinkedIn figures are for regular uploads; Pinterest's apply to both. Sume facts come from the Timeline 1.0 and Video generation docs, the Sume API reference, and Sume's model catalog code. Lengths are compared in How long should a video ad be?.

What size should a video be on each platform?

Sizes are width × height in pixels. Where a page gives no size, the table says what it gives instead. Each platform has its own post with the full spec: TikTok, Instagram Reels, YouTube Shorts, Snapchat, LinkedIn, and Pinterest.

Which one video size works on the most platforms?

9:16 at 1080×1920. It is TikTok's recommended shape, Meta's Instagram shape, Snapchat's only listed shape, one of X's six, and one of Pinterest's four, and it sits inside LinkedIn's range. 1080×1920 is the exact size Meta lists for Instagram Feed and X lists for 9:16; Meta's Reels and Stories pages recommend the larger 1440×2560.

Add a 4:5 cut for Facebook Feed, which X and Pinterest also list, and a 16:9 cut for regular YouTube. X's video ad specs cover all six of X's sizes.

How do I make each size with Sume?

• 9:16, 16:9, and 1:1: ask for the shape with aspect_ratio on POST /v1/videos. Today every Sume video model that lists ratios offers 9:16 and 16:9, and all of them but Gemini Omni Flash 1.1 offer 1:1 (ratios by model).
• 4:5 and 2:3: today no Sume video model lists either, so render them from a 9:16 clip with POST /v1/timeline-1.0/render. fit is a scale/crop mode, cover by default, and Meta video ad specs walks through the 4:5 crop.
• Exact sizes: Timeline's output.width and output.height take even integers from 256 to 2160, so 1080×1920, 1440×1800, 1080×1620, and 1920×1080 are all exact. Its default is 1080×1920.
• Inputs and sound: Timeline reads only your workspace's media.sume.com files, such as earlier Sume outputs. Today its sound comes only from the audio spine and an optional soundtrack, so to keep a clip's own audio, detach it with POST /v1/audio-detach and use it as the spine.

Can Sume output Meta's 1440×2560?

Not at that exact size. Timeline 1.0 caps each output edge at 2,160 pixels, below the 2,560 that 1440×2560 needs. Meta lists 1440×2560 under design recommendations; its technical requirement for Reels ads is a minimum width of 250 pixels for ads under 30 seconds and 500 pixels for ads of 30 seconds or longer, which 1080×1920 clears.