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.
A YouTube page publishes far more about a video than the interface draws. Here is the full list of fields, what each one controls, and how to read them.
YouTube allows 100 characters in a title, but search, suggested and mobile each cut it far sooner. Here is where each surface truncates.
YouTube thumbnail size is 1280x720 at 16:9 - but the number that matters is the 170 pixels wide it is actually viewed at.
YouTube shows three hashtags above your title, ignores every hashtag past 60, and may remove over-tagged videos from search. Here is the working number.
Instagram image sizes by placement: feed, portrait, carousel, Reels cover, Stories and profile. Three ratios cover all of them.