Spec log
Rev 2026-10-21 / Performance Max: image, logo and video specs added from Google Ads Help / TikTok: Spark Ads captions show up to 4 lines / Google Display moving to Demand Gen from June 2026 / Meta Feed, Stories, Reels: still unverified / Every spec links to official docs / Rev 2026-10-21 / Performance Max: image, logo and video specs added from Google Ads Help / TikTok: Spark Ads captions show up to 4 lines / Google Display moving to Demand Gen from June 2026 / Meta Feed, Stories, Reels: still unverified / Every spec links to official docs /
Ad Spec SheetRev 2026-10-21Get an ad audit
Sheet 09Section METARev 2026-10-21

Meta ads: Feed, Stories and Reels

Unverified Meta's Ads Guide blocked our automated check on 2026-10-21, so the ratios below are the widely published ones and have not been confirmed against Meta's own page. Pixel sizes and character limits are left out until verified. Check the Meta Ads Guide before you launch.
PlacementAspect ratio
Feed (Facebook, Instagram)1:1 or 4:5 (unverified)
Stories9:16 (unverified)
Reels9:16 (unverified)