9:16, 4:5, 1:1 or 16:9: choosing the right aspect ratio
Nothing quietly kills a good video like the wrong shape: bars on the sides, a crop through the action, a collage shrunk to a stamp. Aspect ratio is a one-tap decision — if you know what each platform actually wants. Here's the practical map.
The four ratios that matter
9:16 (vertical) fills a phone screen held normally. It's the native shape of TikTok, Instagram Reels, YouTube Shorts, Stories and Snapchat. Full-screen means full attention — no interface framing your video in dead space.
1:1 (square) is the feed shape. It takes maximum area in scrolling feeds, works on Instagram feed posts, and stays readable on both phones and desktops. For grid-style video collages the square is also the most natural canvas — tiles stay comfortably proportioned.
4:5 (portrait) is the tallest shape Instagram and Facebook feeds show in full. It takes more of the screen than a square while staying a feed post — the best default when a video lives in the feed.
16:9 (horizontal) is classic YouTube and desktop. TV-shaped, presentation-shaped. On phones it's small inside a vertical screen, so use it only when the destination is genuinely horizontal.
Cheat sheet by platform
- TikTok, Reels, Shorts, Stories → 9:16, no exceptions worth making.
- Instagram / Facebook feed post → 4:5 for maximum feed real estate, or 1:1 for a classic square.
- YouTube main videos → 16:9.
- Not sure where it'll live → export 9:16 and 4:5 and post each where it belongs.
Aspect ratio and collages specifically
Layout and ratio work together: a layout looks best when every tile has roughly the shape of the clip inside it. Four vertical clips in a 2×2 grid fill a 9:16 frame exactly, and three horizontal clips stacked on top of each other fit it almost perfectly. Two clips side by side, or one above the other, make a nearly square frame — they look best in 1:1 or 4:5, while in 9:16 each clip is cropped to its middle. When a layout fights the ratio, tiles get thin and content gets cropped — if a layout looks cramped, change the ratio before you change the clips.
The efficient workflow: build the collage once, export twice. A collage app with selectable ratios re-flows your layout to each shape — one project becomes a Reel (9:16) and a feed post (4:5) in two renders. Video Grid Collage has nine ratios, including 9:16, 4:5, 1:1, 3:4 and 16:9.
Try it yourself — free
Video Grid Collage · 4.9 on the App Store · 100 layouts, up to 100 clips in one collage