Field notes
Playbooks, teardowns and the occasional argument — everything we have learned helping creators grow across every major platform.
Twitter image sizes on X: 16:9 for single images, 1200x628 for link cards, and the timeline crop that decides what people actually see.
TikTok video size is 1080x1920 at 9:16. The harder part is the safe zone - the caption, the action rail and the username cover a third of your frame.
YouTube thumbnail size is 1280x720 at 16:9 - but the number that matters is the 170 pixels wide it is actually viewed at.
Every social media image size that matters, organised by aspect ratio rather than by platform - because the ratio is what stays true when the pixels change.
Instagram image sizes by placement: feed, portrait, carousel, Reels cover, Stories and profile. Three ratios cover all of them.