Somewhere in a brand's Slack right now, a buyer has your media kit open in one tab, nine competitors' kits in the others, and a planning meeting in five minutes. Everything worth knowing about how to build the document follows from that image. A media kit is not a portfolio, a manifesto, or a scrapbook. It is a pre-answered questionnaire for a skimming professional — and the questionnaire is the buyer's spreadsheet, which means you already know the questions.
The ninety-second read
In rough order, the skim extracts: who the audience is; how many of them actually see a placement; what exactly is for sale; what it costs, or how to find out; and why any of the foregoing should be believed. Kits fail by burying these five answers under design, or by answering different questions entirely — three pages about your founding story is three pages between the buyer and the cell they are trying to fill. Structure the kit as those five answers, in that order, and you have out-formatted most of the folder you are competing in.
Numbers that survive scrutiny
- Audience composition before audience size. Job titles, industries, seniority, geography — for any B2B-adjacent channel this is the single highest-value section, because it is the sponsor's acquisition math with your name on it. “18,000 subscribers” is a fact about you; “61% hold engineering roles with purchasing influence” is a fact about their campaign.
- Delivery numbers with denominators. Median opens per send, median video views at 30 days — the median, not your viral week. Buyers compare kit claims to delivered reality as a matter of routine, and the difference is your renewal rate.
- Engagement in the buyer's own units. Click-through on past sponsored placements is the number they can actually use; an abstract “engagement rate” invites them to guess what it launders.
- Trajectory, honestly. A small channel growing 15% a month is a different purchase from a large one shrinking. Show the curve either way — the buyer who discovers decline after buying growth does not come back, and tells colleagues.
The theme is honesty as strategy, not virtue: every flattered number in a kit is borrowed from the renewal at punitive interest. Industry surveys of the buyers themselves — Influencer Marketing Hub's annual benchmark report is a reasonable window — show the weighting moving steadily from raw reach toward engagement and demonstrated outcomes. The inflated follower count is not even impressing its intended audience anymore.
Proof beats promises
The section buyers trust most is the one about other buyers. Past sponsor logos are table stakes; the logo that appears twice is the argument, because a renewal is the one metric that cannot be flattered — somebody's spreadsheet cleared, and came back. One case study with real numbers and the sponsor's permission outweighs a page of adjectives, and a quoted line from a buyer (“the survey said a third of signups heard about us here”) outweighs the case study. If you have none of these yet, say what is true — “first sponsors get founding-rate pricing and my full attention” — which reads as honest ambition rather than concealed weakness.
The rates page problem
And then the last page, where every kit gets awkward. Print a rate and you have anchored every future negotiation at your own guess — the same guess the CPM tables can't save — and the PDF will still be circulating with this year's number two years from now; a media kit is a rate card that never learns what month it is (Q4 and February, priced identically, wrongly). Print nothing and you have added a round trip of exactly the email exchange nobody enjoys. The conventional compromises — a “from” floor, or “rates on application,” which reads as standing from an established channel and as evasion from a new one — split the difference without resolving it.
The kit that updates itself
The unresolvable page is unresolvable because it is trying to freeze a market price into a document. The escape is to link a market instead: on slotsbid, the slot page does the rates page's job without committing the number — the placement is specified exactly, your floor lives as a private reserve, and the price is whatever approved sponsors actually offer for that date. Cleared history accumulates in a public price index, which is the one proof of value a PDF cannot inflate: not what you claim the slot is worth, but what named sponsors paid. The kit shrinks to the four honest sections, and the fifth becomes a link.
Sources and further reading
- Justin Moore, Sponsor Magnet (2025) — the fullest current treatment of packaging and pitching, including proposal structure.
- Influencer Marketing Hub, Influencer Marketing Benchmark Report (annual) — buyer-side priorities, in the buyers' own survey answers.
- Paved, Newsletter sponsorship rates — what the market's reference tables look like from the buyer's chair.
- Earlier in this series: what sponsors measure · the sponsorship calendar.