in-content, sidebar, end-of-article

Most popular GDN size; highest inventory and CTR

page header, above-the-fold

Desktop header standard; massive reach

sidebar, right rail

Most common vertical format

sidebar, between content blocks

Fast-growing format; high engagement

mobile header/footer

Standard mobile banner; essential for mobile reach

mobile header/footer

Double-height mobile; significantly better CTR than 320x50

premium header takeover

Highest desktop viewability (65.8%)

in-content, end-of-article

Strong in-text performance

sidebar, premium placements

Highest engagement among large formats

sidebar, in-content

Versatile square format

sidebar

Classic sidebar vertical

in-content, legacy header

Classic format; still supported

header, above-the-fold

Wide desktop header format

auto-adapts to all GDN placements

Landscape 1200x628, Square 1200x1200, Portrait 960x1200. Google auto-assembles.

feed (mobile & desktop)

4:5 portrait (1080x1350) recommended for mobile. Primary text 125 chars, headline 40 chars.

feed (mobile & desktop)

H.264 codec, AAC audio. Primary text 125 chars, headline 40 chars.

feed, stories, marketplace, search, messenger

2-10 cards. All cards must use same aspect ratio. Headline 40 chars per card.

stories

Full-screen vertical. Image displays up to 5 seconds.

reels feed

30 FPS min. Keep text/logos away from top and bottom 14% (~250px).

feed (mobile only)

Cover image/video + product grid. Headline 40 chars, primary text 125 chars.

before/during/after video content

Landscape format for video content adjacency.

feed

4:5 portrait (1080x1350) for maximum screen real estate. 125 chars primary text.

feed

30 FPS min, 720px min resolution.

stories

Safe zone: keep text/logos away from top and bottom 14% (~250px).

reels tab, reels in feed, explore

30 FPS min, 720px min. Best for Gen Z/Millennials.

feed, stories, explore, shop tab

Requires product catalog + Instagram Shopping enabled. Product tags link to PDP.

pre-roll, mid-roll, post-roll

Skippable after 5 seconds. CPV pricing. Companion banner 300x60 (desktop).

pre-roll, mid-roll, post-roll

Must watch entire ad. CPM pricing. Best for full message delivery.

pre-roll

Non-skippable. CPM pricing. Best for broad reach and brand recall.

shorts feed

Vertical required. Swipeable. Best for mobile-first audiences.

search results, home feed, watch next

User opts in to watch. CPV pricing. Thumbnail 1280x720 min.

YouTube homepage

Reservation-based. CPM pricing. Massive reach. Requires Google sales rep.

For You feed

Audio required. Caption max 100 chars. Safe zones: avoid top 10%, right 10%, bottom 20%.

For You feed

Boosts organic posts. 30% higher completion rates, 142% higher engagement vs standard.

full-screen on app open

Skippable after 3s. Reservation-based premium pricing.

full-screen on app open

Non-skippable. One advertiser per category per day. Reservation-based.

feed

2-35 images. Background music mandatory. Caption max 20 chars.

feed, TikTok Shop

1-4 product cards. Requires integrated product catalog.

feed

Landscape 1200x628, Square 1200x1200, Vertical 628x1200. Intro text 600 chars max, headline 70 chars.

feed

30 FPS recommended. Intro text 600 chars max, headline 70 chars.

feed

2-10 cards. Intro text 255 chars max, card headline 45 chars.

feed

Under 10 pages recommended. Great for whitepapers, case studies, reports.

LinkedIn inbox

Subject 60 chars, body 1500 chars, CTA 20 chars. Banner creative 300x250.

timeline

Post copy 280 chars (23 chars consumed per link).

timeline

H.264 codec. 29.97 or 30 FPS. Post copy 280 chars.

timeline

2-6 slides. Single aspect ratio required within one carousel.

home feed, search

Title 100 chars, description 500 chars.

home feed, search

Title 100 chars, description 500 chars.

home feed, following tab

Multi-page storytelling format. Title 100 chars.

between stories, discover content

Brand name 32 chars, headline 34 chars. Safe zones: 6% L/R, 10% top, 15% bottom.

discover, stories

Main creative + 2-4 product thumbnails (160x160). Brand 32 chars, headline 34 chars.

premium content

Audio required. -16 LUFS, 192 kbps min. Guaranteed video views.

camera, effects panel

Face Lens (front camera) or World Lens (rear camera). Average engagement 20-75s.

feed

4:3 landscape recommended for cross-device. Headline 300 chars max (80-100 rec).

feed

30 FPS max. Headline 300 chars max (80 rec). 70%+ traffic is mobile.

feed

Up to 40,000 char body, 20 images, 5 videos. Native long-form content.

pre-roll, mid-roll (streaming platforms)

Non-skippable. ~95% completion rate. H.264, 15-60 Mbps bitrate, VAST 2.0/3.0.

displayed when viewer pauses content

IAB standardized Dec 2025. Non-interruptive. High-attention placement.

Prime Video, Freevee, Fire TV, Twitch

H.264/MPEG-2 codec. Min 15 Mbps (rec 50 Mbps). Non-skippable. CPM.

The Roku Channel, streaming apps

Non-skippable. ~95% completion. 90M+ streaming households.

pre-roll, mid-roll during streams

H.264. Min 4000 kbps. Non-skippable. VAST 2.0/3.0. Gaming/18-34 audience.

desktop sidebar, mobile full-screen

Non-skippable. Good for repurposing social media creative.

search results

Up to 15 headlines (30 chars each), 4 descriptions (90 chars each). 2 URL paths (15 chars each).

Bing, Yahoo, DuckDuckGo search results

Up to 15 headlines (30 chars each), 4 descriptions (90 chars each). Often cheaper CPCs than Google.

App Store search results

Auto-generated from App Store listing. Max 100 chars keywords. 65%+ avg conversion rate.

between music/podcast tracks

Companion display 640x640 (JPEG/PNG, 200KB). -14 dBFS RMS, -0.2 dBFS peak.

podcast pre-roll, mid-roll

Dynamically inserted via SAI. Host-read or pre-produced.

between music tracks

Non-skippable. Companion display 500x500 or 300x250.

pre-roll, mid-roll, post-roll

128-192 kbps. IAB Podcast Measurement v2.2. DAI = 92% of podcast ad revenue.

publisher recommendation widgets

Headline max 150 chars (60 rec). Brand name 25 chars. CTA 15 chars.

publisher recommendation widgets

Headline max 70 chars. Brand name 25 chars. Description 90 chars.

roadside

RGB color. Bold, high-contrast. Max 7 words recommended for drive-by.

bus shelters, subway stations, transit hubs

Close-range viewing. Fine detail acceptable.

inbox (full email)

Standard 600px or 640px width. Must include unsubscribe link. CAN-SPAM/GDPR compliant.

within newsletter content

300x250, 728x90, 320x50 common sizes. No JavaScript. Alt text required.

Amazon.com, off-site via Amazon DSP

Sizes: 1200x628, 1200x1200, 600x500, 300x250, 728x90, 970x250, 160x600.

Walmart.com, Walmart app

Brand logo 300x180, custom headline, up to 4 products. eCPM auction.