Strategy · 4 min read
What's the best ad length for Instagram Reels & YouTube Shorts?
Short answer: 15–30 seconds for most ad reels, with the single most important rule being that your hook lands in the first 3 seconds.
Instagram Reels
7–30 seconds performs best for ads. Under 15s for a single sharp message; up to 30s if you're telling a mini-story. Beyond 30s, completion rate drops fast unless the content is genuinely gripping.
YouTube Shorts
Shorts allow up to 60s, but ad performance peaks at 15–25 seconds. Use the extra room only if it earns attention.
TikTok
21–34 seconds is the sweet spot for branded content — long enough to build, short enough to finish.
The 3-second rule
Across every platform, the first 3 seconds decide everything. Open on motion, a question, or a bold claim — never a logo. AdsDial scripts are built hook-first for exactly this reason.
FAQ
How long should an Instagram Reel ad be?
15–30 seconds for most ads. Keep it under 15s for a single message; the hook must land in the first 3 seconds.
Do longer reels perform worse?
Beyond ~30 seconds, completion rate usually drops unless the content is exceptionally engaging. Shorter, sharper reels typically win for ads.