Size comparison

Two to five sizes as circles whose areas are exactly to their values, growing in turn side by side on one line, or one inside the other where they differ too much, each with its figure counting to exactly its value and its name: 10 to 16 seconds. In eight styles, each wearing your brand's colours, fonts, logo, presenter and background.

Template id	tpl_ddb40e683bc7
Markets	Every market
Variants	Corporate glass, Bento grid, Broadcast news, Editorial, Swiss grid, Neo-brutalist, Soft friendly, Data terminal
Ready-made feeds	None

Use cases

• How big something is beside something people know: the new warehouse beside a football pitch.
• This year beside last year, one market beside another, the Moon beside the Earth.
• Every circle's area exactly to its value, so twice the size is twice the area.

Variants

A variant is this template drawn another way, and it comes in versions: immutable builds, the newest first. A channel follows the newest version of its variant, unless it is pinned to one.

Variant	What it is	Versions	Newest
Corporate glass	Frosted glass cards over an aurora in your brand colours: calm and premium.	1	1.0.0
Bento grid	Rounded tiles in your brand colours, each moving on its own: a modern product look.	1	1.0.0
Broadcast news	A news channel in your colours: channel bug, lower third, ticker and your presenter.	1	1.0.0
Editorial	A magazine page in your paper tone and serif: masthead, hairline rules and a byline.	1	1.0.0
Swiss grid	A strict grid, large type and your brand colour as the one accent. Nothing bounces.	1	1.0.0
Neo-brutalist	Loud flat blocks in your colours with thick borders and hard shadows.	1	1.0.0
Soft friendly	Soft shapes and rounded cards in tints of your brand colour: warm and approachable.	1	1.0.0
Data terminal	A market terminal whose ink is your brand colour, the figures scrambling into place.	1	1.0.0

What it accepts

Every variant takes the same content, so one document draws in any of them.

Size comparison: two to five sizes as circles whose areas are exactly to their values, growing in turn side by side on one line, or one inside the other where they differ too much, each with its figure counting to exactly its value and its name. metaData is the post's title, descriptions and hashtags and is never drawn.

Field	Type	Required	Limit	What it is
clipData	group	yes		Clip data: Everything drawn: the title, the sizes, the note, the source and the look.
clipData.kicker	text		up to 20 characters	Kicker: A word or two above the title, such as HOW BIG.
clipData.title	text	yes	up to 80 characters	Title: What the sizes compare. Shown from the first frame.
clipData.sizes	list	yes	at least 2, up to 5	Sizes: Two to five, in the order they grow, which is the order meant. Each circle's area is its value exactly: twice the value, twice the area. Each adds two seconds.
clipData.sizes[]	group			Size
clipData.sizes[].label	text	yes	up to 32 characters	Name
clipData.sizes[].value	number	yes	from 0, 4 decimals	Value: Above nought, in the unit below.
clipData.sizes[].detail	text		up to 48 characters	Line under it: A few words under the name.
clipData.prefix	text		up to 8 characters	Prefix: Written before every value, such as a currency sign.
clipData.unit	text		up to 12 characters	Unit: Written after every value, such as m² or km.
clipData.note	text		up to 100 characters	Note: One line under the sizes.
clipData.source	text		up to 70 characters	Source: Where the figures come from, at the foot. Drawn exactly as written.
clipData.styleWords	group			Style words: The few words some styles write into their own frame, each drawn exactly as written, in the language you write it in. A word left out is not drawn: no template adds a word of its own. The same keys in every format of the collections; each style draws only its own.
clipData.styleWords.live	text		up to 16 characters	Live marker (Broadcast news): Written beside the light in Broadcast news' channel bug, such as LIVE. Left out, the light stands alone.
clipData.styleWords.byline	text		up to 12 characters	Byline (Editorial): Written before the presenter's name in Editorial, such as By. Left out, the name stands alone.
clipData.styleWords.functionKeys	list		up to 4	Function keys (Data terminal): Data terminal's row of keys F1 to F4, one word each, in order, such as HELP, DATA, CHART and NEWS; the second is drawn held down, and a key that does not fit the row is left out. Left out, no keys are drawn.
clipData.styleWords.functionKeys[]	text		up to 12 characters	Key
clipData.styleWords.commandKey	text		up to 10 characters	Command key (Data terminal): The key at the end of Data terminal's row, in the rise colour, such as GO. Left out, none is drawn.
clipData.styleWords.realTime	text		up to 12 characters	Real-time light (Data terminal): Written beside the blinking light in Data terminal's status bar, such as RT. Left out, the light stands alone.
clipData.styleWords.messageLabel	text		up to 12 characters	Message window label (Data terminal): The tab on Data terminal's message window round the presenter, such as MSG. Left out, the window has no tab.
clipData.styleWords.pictureLabel	text		up to 12 characters	Picture panel label (Data terminal): Written in the strip along the top of Data terminal's picture panels, such as IMG. Left out, the strip stays empty.
clipData.look	group			Look: How the clip looks and moves within its style. The same switches in every format of the collections. Leave a switch out, or set it to the style's own, and the style decides.
clipData.look.theme	enum		auto, brand, light, dark, bold	Theme: The style's own choice; your brand's own colours and background; a light or dark page tinted with your brand colour; or your brand colour as the page.
clipData.look.pace	enum		auto, calm, standard, punchy	Pace: How things arrive: the style's own rhythm, calm fades, a standard rhythm, or punchy slams and cuts.
clipData.look.corners	enum		auto, square, soft, round	Corners: The shape of cards, panels and marks.
clipData.look.align	enum		auto, start, centre	Text alignment: Where the text lines up.
clipData.look.logo	enum		auto, free	Logo: The style's own: the logo on the style's plate (a card, a disc, a badge) so it reads on any page. As it is: the logo whole, with no plate, frame or crop, for a logo made to stand on the page, such as one with a transparent background. As it is, make sure your logo reads on the page of the theme you choose.
clipData.look.logoSize	enum		auto, small, large	Logo size: Standard is the style's own size. Small draws the logo a fifth smaller, with its plate. Large draws it a quarter larger wherever the style has room for it, and at the standard size where it has none.
clipData.look.hideHeader	boolean			Hide logo and title: Leaves out the line at the top of the clip: your logo, the title line and the style's decoration around them, so the content starts at the top. To leave it out of every clip, switch Logo and title line off in your brand's settings.
clipData.look.hideFooter	boolean			Hide footer line: Leaves out your footer line at the foot of the clip, with whatever the style draws only to carry it, so the content reaches further down. Your presenter and the source line stay. To leave it out of every clip, switch Footer line off in your brand's settings.
clipData.look.pattern	enum		auto, none, dots, grid, lines	Background pattern: The fine texture behind the content. The style's own keeps what the style draws there, and some styles draw none. None leaves the background plain. Dots, Grid and Diagonal lines draw that pattern faintly instead, the same in every style, in the colour of your page.
metaData	group			Meta data: Everything about the post that is never drawn in the clip: its title, its description in four lengths, one per kind of platform, and its hashtags. Reelwire adds the brand's description, link and hashtags after it. Left out, the post text is generated from the clip data.
metaData.title	text		up to 100 characters	Title: Used where the platform has a title of its own: Facebook Feed, LinkedIn, Pinterest and YouTube. Up to 100 characters, which every one of them takes.
metaData.captionTiny	text		up to 200 characters	Tiny description (Pinterest, Threads, X): Up to 200 characters. The brand's description, link and hashtags follow it within the platform's limit.
metaData.captionShort	text		up to 500 characters	Short description (Telegram, Threema, WeChat, WhatsApp): Up to 500 characters. The brand's description, link and hashtags follow it within the platform's limit.
metaData.captionMedium	text		up to 1500 characters	Medium description (Discord, Facebook Reels, Instagram, LinkedIn, Signal, Slack, TikTok): Up to 1500 characters. The brand's description, link and hashtags follow it within the platform's limit.
metaData.captionLong	text		up to 4000 characters	Long description (Facebook Feed, YouTube): Up to 4000 characters. The brand's description, link and hashtags follow it within the platform's limit.
metaData.hashtags	list		up to 15	Hashtags: Written without the #. Up to 15, which every platform takes.
metaData.hashtags[]	text		up to 60 characters	Hashtag

locales carries other languages: under each language code, the parts of clipData and metaData that differ, laid over the default, so a language with no copy still renders.

A picture is always a file from your media library: media:// followed by its id or its name. Anything the table does not list is refused, and so is anything over its limit, with a 400 schema_validation error that names the field.

Ask Reelwire for the whole JSON Schema, the document your content is checked against, without signing in:

curl "https://app.reelwire.io/v1/formats/template/tpl_ddb40e683bc7?variant=Corporate%20glass&version=1.0.0"

Delivery JSON

Your own system sends this to one of your streams, POST /v1/stream, and every channel listening to that stream draws it with its template. data is the document described above; a stream with an empty field map passes it to the template unchanged. Try it first on POST /v1/stream/validate, which answers the same without publishing anything. Streams and feeds explains the rest, including how to map a document of your own shape instead.

{
  "streamId": "st_your_stream_id",
  "eventId": "01M2SQMKK3G1NVFXV31DCBVB95",
  "occurredAt": "2026-09-23T07:00:00Z",
  "locale": "en",
  "data": {
    "clipData": {
      "kicker": "Growing",
      "title": "Our new warehouse is four times the old one",
      "sizes": [
        {
          "label": "Our old warehouse",
          "value": 1800,
          "detail": "Until this summer"
        },
        {
          "label": "A football pitch",
          "value": 7140,
          "detail": "For scale"
        },
        {
          "label": "Our new warehouse",
          "value": 7400,
          "detail": "Open from 1 November"
        }
      ],
      "prefix": "",
      "unit": "m²",
      "note": "Room for 3,000 more orders a day",
      "source": "Kite logistics, 2026",
      "styleWords": {
        "live": "LIVE",
        "byline": "By",
        "functionKeys": [
          "HELP",
          "DATA",
          "CHART",
          "NEWS"
        ],
        "commandKey": "GO",
        "realTime": "RT",
        "messageLabel": "MSG",
        "pictureLabel": "IMG"
      },
      "look": {
        "theme": "auto",
        "pace": "auto",
        "corners": "auto",
        "align": "auto",
        "logo": "auto",
        "logoSize": "auto",
        "hideHeader": false,
        "hideFooter": false,
        "pattern": "auto"
      }
    },
    "metaData": {
      "title": "Our new warehouse is four times the old one",
      "captionTiny": "Our new warehouse: 7,400 m², four times the old one and a little bigger than a football pitch. Open from 1 November.",
      "captionShort": "Our new warehouse opens on 1 November: 7,400 square metres, four times the 1,800 of the old one, and a little bigger than a football pitch. It gives us room for 3,000 more orders a day, so what you order goes out faster.",
      "captionMedium": "Our new warehouse opens on 1 November.\n\n7,400 square metres: four times the 1,800 of the old one we leave this summer, and a little bigger than a football pitch at 7,140.\n\nWhat it means for you: room for 3,000 more orders a day, so what you order leaves us sooner, even in the weeks before Christmas.",
      "captionLong": "Our new warehouse opens on 1 November, and it is big.\n\n7,400 square metres. The old one we leave this summer had 1,800, so the new one is four times its size. For scale, a football pitch is 7,140 square metres: the new warehouse is a little bigger than that.\n\nWhy we built it: in the weeks before Christmas last year we ran out of room, and orders waited for space to be packed. The new building gives us room for 3,000 more orders a day.\n\nWhat it means for you: what you order leaves us sooner, all year round and in the busy weeks too.",
      "hashtags": [
        "logistics",
        "warehouse",
        "growth",
        "ecommerce",
        "kite"
      ]
    }
  }
}

The delivery names no version: which build draws it is the channel's choice, the newest of its variant or the one it is pinned to. eventId is a ULID you make once per event: sending the same one again changes nothing. occurredAt is when the thing happened, not when you sent it. locale is the language of the text in data, and data.locales carries other languages beside it.