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    Ad Specs

    Use these dimensions, aspect ratios, and file limits to make sure your creative renders crisply across every screen.

    Slot specifications

    SlotDisplay sizeRecommended uploadAspectMax file sizeFormats
    Medium Rectangle
    Sidebar, in-article, homepage banner zones
    		300×250
    600×500
    		6:52 MBJPG, PNG, WebP
    Large Rectangle
    Sidebar (high-visibility), in-article
    		336×280
    672×560
    		6:52 MBJPG, PNG, WebP
    Half Page
    Sidebar only — long-form articles, news pages
    		300×600
    600×1200
    		1:23 MBJPG, PNG, WebP
    Leaderboard
    Below post / footer of articles
    		728×90
    1456×180
    		8.09:12 MBJPG, PNG, WebP

    Where your ad appears

    PlacementLocation on siteAccepted sizes
    Homepage banner
    Highest traffic placement on the site.
    		Homepage, alongside the lead stories300×250, 336×280, 300×600
    Article sidebar banner
    Stays visible while readers scroll long articles.
    		Sidebar of article, blog and video pages300×250, 336×280, 300×600
    Below article banner
    Reaches readers who finished the piece — strongest intent.
    		Directly beneath article and video content728×90
    Homepage sponsored post
    Native card that reads like editorial content.
    		Sponsor post cards on the homepage—
    Article sponsored post
    Native placement next to related reading.
    		Sponsor cards in article and video sidebars—
    Homepage podcast feature
    Audio players get long dwell time.
    		Podcast section on the homepage—
    Article podcast feature
    Pairs audio with related written coverage.
    		Podcast section in article and video sidebars—
    Homepage event listing
    Drives registrations for dated events.
    		Event listings on the homepage—
    Article event listing
    Contextual event promotion.
    		Event listings in article and video sidebars—

    Slot-specific notes

    Medium Rectangle (300×250)

    Most flexible slot. Note the aspect is 6:5 (wider than tall). Uploading a 5:6 (taller than wide) file will be cropped or distorted.

    Half Page (300×600)

    Highest impact sidebar unit. Because of its size on screen, even 1x uploads often look acceptable — but 2x is still recommended.

    Leaderboard (728×90)

    Wide horizontal banner. Keep typography large and centered — narrow vertical space.

    Per-viewport creative variants

    The uploader accepts up to three creatives per ad — one for desktop, tablet, and mobile. The platform automatically serves the best fit to each visitor.

    • Desktop is required and acts as the fallback when device-specific art isn't supplied.
    • Tablet and mobile are optional but recommended for tight phone layouts and high-DPI tablet screens.
    • All three variants share the same slot dimensions — pick the size once in the wizard's first step, then upload one image per device.

    Format recommendations

    WebP — best compression. Use this when possible; smaller files load faster and there's no visible quality loss.
    JPG — best for photographs and complex imagery. Save at 80–90% quality.
    PNG — best for logos, flat color, and any creative that needs transparency or sharp text.
    Animated formats (GIF, animated WebP) and video are not currently supported.

    Pre-upload checklist

    • Resolution is at least 2× the display size
    • Aspect ratio matches the slot exactly
    • File is under the slot's size cap
    • Format is JPG, PNG, or WebP
    • Critical text and logos are well inside the safe area (avoid edges)
    • The clickthrough URL goes to a working, mobile-friendly landing page

    Questions? Contact your account manager or the support team.