Creative Advertising Specs and Placeholders

This guide provides the required specifications for creative assets across display, social, video, audio, and streaming platforms. Following these specs ensures your ads display correctly and deliver the best results.

Display Ad Specs

Standard display banner sizes:

• Mobile Banner: 320 x 50 px
• Leaderboard: 728 x 90 px
• Wide Skyscraper: 160 x 600 px
• Medium Rectangle: 300 x 250 px
• Half-Page Skyscraper: 300 x 600 px
• Billboard: 970 x 250 px
• Mobile Full-Page Interstitial (Portrait): 320 x 480 px
• Mobile Full-Page Interstitial (Landscape): 480 x 320 px
• Tablet Full-Page Interstitial (Portrait): 768 x 1024 px
• Tablet Full-Page Interstitial (Landscape): 1024 x 768 px

Accepted file formats: JPG, PNG, GIF, or HTML5
Optimal file size: 150 KB
Resolution: Minimum 72 ppi, recommended 144 ppi

For more information on rich media creative guidelines, please refer to this article.

Facebook/Instagram Ad Specs

• 1200 x 628 px (Facebook placements)
• 1080 x 1080 px (Instagram/Facebook placements)
• 1080 x 1920 px (Instagram/Facebook Stories & Reels)
• Image format: JPG or PNG
• Video format: MP4

Ad Text Requirements:

• Primary Text (required): 125 characters recommended (up to 1,000)
• Headline (required): 40 characters recommended (up to 225)
• Description (optional): 30 characters recommended (up to 500)

LinkedIn Ad Specs

Design Recommendations

• File type: JPG, PNG, or GIF
• File size: Up to 5 MB
• Image ratios:
  • 1.91:1 (horizontal, desktop and mobile)
  • 1:1 (square, desktop and mobile)
  • 1:1.91 (vertical, mobile only)

Text Recommendations

• Ad Name (optional): 255 characters
• Headline: 70 characters
• Introductory Text: 150 characters
• Description (LinkedIn Audience Network only): 70 characters

Technical Requirements

• File type: JPG, PNG, or GIF
• File size: Up to 5 MB

Image Dimensions

• Horizontal/Landscape: 640 x 360 px minimum, 7680 x 4320 px maximum, recommended 1200 x 628 px (1.91:1)
• Square: 360 x 360 px minimum, 4320 x 4320 px maximum, recommended 1200 x 1200 px (1:1)
• Vertical: 360 x 640 px minimum, 2430 x 4320 px maximum, recommended 628 x 1200 px (1:1.91), 600 x 900 px (2:3), 720 x 900 px (4:5)

Call to Action Options

• Apply
• Download
• View Quote
• Learn More
• Sign Up
• Subscribe
• Register
• Join
• Attend
• Request Demo

URL Requirements

• Landing page URL: Required
• URL prefix: http:// or https://
• URL characters: Up to 2,000 characters

YouTube Video Ad Specs

• Resolution: 1080p (Full HD)
• Recommended pixels:
  • 1920 x 1080 px (horizontal)
  • 1080 x 1920 px (vertical)
  • 1080 x 1080 px (square)
• Aspect ratios:
  • 16:9 for horizontal
  • 9:16 for vertical
  • 1:1 for square
• Accepted formats: MPG (MPEG-2 or MPEG-4), WMV, AVI, MOV, FLV, MPEG-1, MP4, MPEGPS, 3GPP, WebM, DNxHR, ProRes, CineForm, HEVC (h265)
• File size: Up to 256 GB

Connected TV / OTT Video Ad Specs

• Resolution:
  • 1280 x 720 px (720p)
  • 1920 x 1080 px (1080p)
• Duration: 15 or 30 seconds recommended (60 seconds maximum; non-standard durations may have limited reach)
• Aspect ratio: 16:9
• File format: MP4
• File size: Up to 1 GB

Tip: To check if your video meets the 16:9 aspect ratio, divide the width by the height. If the result is 1.77, your video is 16:9. For example, 2560 ÷ 1440 = 1.77.

Programmatic Audio Ad Specs

• Supported file formats: OGG, MP3, MP4, WAV, FLAC, AAC
• Companion banner: 300 x 250 px (JPG, PNG, GIF; up to 700 KB)
• API framework: VAST 2.0+ supported
• Max file size: Under 500 MB (smaller is better)
• Bit rate: 128–160 Kbps recommended (max 320 Kbps; publisher dependent)
• Duration: 15 or 30 seconds recommended for widest inventory access

Spotify Audio Ad Specs

• File type: MP3, OGG, or WAV (OGG required for programmatic)
• Duration: Up to 30 seconds
• File size: 1 MB (up to 500 MB for private marketplace and programmatic)
• Companion banner: 640 x 640 px (JPEG or PNG; 1:1 aspect ratio)
• Sample rate: 44.1 kHz (audio with incorrect sample rate may play at the wrong speed)
• Bit rate: 192 Kbps (important for high-quality audio)
• Stereo: Recommended for best sound quality and spatial mixing
• Overall loudness: -16 LUFS (integrated average, ±1.5 LUFS) with a True Peak limit of -2.0 dBTP

Ensuring consistent volume and quality helps prevent listener disruption and improves ad engagement.

Creative Asset Placeholders

Below are sample images for common display ad sizes. Use these as placeholders when designing your creative assets:

Leaderboard (728x90px)

Big Box (300x250px)

Skyscraper (160x600px)

For any additional questions or support, please contact the SoCast team.