We read the spec sheets so you don't have to

Amazon scatters its specs across 11 different help pages for Sponsored, DSP, and Stores. We consolidated all 63 placements and 29 dimension combos into one check, including the undocumented stuff: the DSP 40KB file size gotcha, locale-specific exceptions for FR/IT/ES/JP, Retina 2X requirements buried in a help article, and the white-background border rule nobody tells you about until your ad gets bounced.

Roundel is the most complex network we track. 9 format types, 48 placements, 21 unique dimension combos, split across on-platform and off-platform with completely different specs for each. The #1 rejection cause? Submitting off-platform dimensions for on-platform placements. Easy mistake when both say "display" in your project tracker.

Walmart doesn't publish a spec sheet. The closest thing is a Figma community file and whatever you can piece together inside Ad Center. We built our spec database from that Figma template, Trade Desk docs, and rejection feedback from real campaigns. The transparent-PNG logo requirement alone trips up half the agencies we talk to.

Grocery campaign windows are unforgiving. Miss a Thanksgiving slot because your Hero Banner was 1440×750 instead of 2880×750, and that window is gone. We validate all 7 placement types including the shoppable and video formats that most teams forget have different specs from standard display.

Good luck finding Albertsons specs before you sign an IO. They don't publish them. Their Criteo Commerce Display formats use proprietary dimensions (576×200, 270×390, 310×500) that no other network shares. We reverse-engineered all 13 placement types including the safe zones for Flagship and Showcase that aren't documented anywhere.

For a "value" retailer, DGMN has a surprisingly complex spec surface: 13 placement types spanning onsite, offsite, DOOH (8 unique screen sizes), CTV, audio, three different email formats, and Meta social. The full spec list is gated behind a sales rep's Playbook. We have all of it.

Kroger has rules you won't find in any generic spec guide. No Oxford commas. No exclamation points. Only "OFF" and "NEW" can be capitalized. A mandatory Banner Bar with 1px black border. Plus a 200% art area requirement that confuses designers who've never worked with CAAM Creative Builder.

Pharma-adjacent creative rules push CVS rejection rates to 40-50% for regulated categories like supplements and OTC drugs. Standard spec tools don't even know these rules exist. We validate the technical specs so your creative clears that hurdle before it hits the regulatory review layer, where rejections are much more expensive to fix.

Home Depot rebranded to Orange Apron Media in 2024 and launched a new platform, which made everyone's existing spec docs instantly outdated. No public spec sheet exists. Product-in-context imagery rules, white background enforcement, and in-store digital orientation requirements all come from rejection feedback, not documentation.

Lowe's has formats nobody else validates: in-store audio ads (via their Vibenomics partnership) and direct mail for install services. A direct mail rejection costs $2–$4K in wasted print production. We check audio duration, bitrate, and sample rate alongside your standard display specs in one call.

Ulta doesn't publish specs publicly. You only get them through a managed service relationship with their brand partner team. We maintain an independent spec database for all 7 UB Media placement types, including the beauty-specific rules around color accuracy and claims that generic tools have no idea about.