Most children's book portfolios arrive looking much the same: a dozen lovely drawings, no clear sense of who they are for. Editors and agents are not short of beautiful pictures. They are short of illustrators who can be trusted with thirty-two pages, a tight deadline and a four-year-old's attention. Your portfolio is where you prove you can be.
What UK publishers are actually assessing
An art director flicks through fast. In those first few seconds they are looking for a character they could imagine on a cover, evidence that pictures can carry a story, and a clear signal about which age group you suit. Draughtsmanship sits underneath all of that, but it is not the whole test.
They are also asking quieter questions. Do you leave space for text? Do you understand a page turn? Will your palette sit comfortably next to the busy, saturated books already on a bookshop table? A portfolio that answers these without being asked is worth more than one with a hundred finished paintings.
Give it a spine. A one-line statement at the top — "character-led picture books for ages three to seven, pencil and gouache" — tells a commissioner where to file you.
Character sheets that do real work
Character sheets are the most useful pages you will make, because they solve a publisher's central worry: can this person draw the same child forty times without drift? A single pretty portrait does not answer that. A sheet does.
What belongs on a sheet
- The same character in front, back, three-quarter and profile views
- A row of expressions: happy, wary, furious, bored, caught out
- Three or four action poses, including one that is physically awkward
- Close detail on hands, feet and hair, drawn at scale
- A small palette swatch showing the exact colours you used
- A height line-up with a friend, a parent or a dog
- Two or three lines of written character: name, age, temperament, what they want
That last point is not decoration. A short note shows you think in stories, not just shapes.
The consistency test
Draw your character, put the sheet away for a week, then draw them again from memory — walking, sitting, sulking. If the silhouette holds, you have a character. If it doesn't, simplify: reduce them to two or three basic shapes and rebuild. Children recognise silhouette and proportion long before they notice fine detail, and so do art directors.
Narrative spreads: proving you can pace a story
Publishers rarely commission from single images. They commission from sequences. Take one small moment — a child losing a shoe in a crowd, a dog stealing a sandwich — and tell it across four spreads without words.
- Establish the place and the mood with a wide shot.
- Move closer as the trouble starts.
- Use the page turn for the surprise, not the resolution.
- End with a wide, quiet image that lets the reader breathe.
Leave a clear text area on at least two spreads, and resist filling every corner. Show that you can compose around type. If you work digitally, keep the layered file: some editors will ask to see how a spread was built, and a sensible layer structure reads as professional.
Age-band samples, and how they differ
A common mistake is to send one set of images and hope for the best. Show three to five pieces per band, labelled clearly, so an editor can see where you fit.
Picture books (roughly three to seven)
Big shapes, strong silhouettes, warm or bold colour, and a character whose face reads from across a room. The pictures carry the story; the text is spare.
Young fiction and chapter books (roughly five to nine)
Lighter line work, simpler interiors, more frequent spot illustrations. Your samples should include a few black-and-white or two-colour pieces, since interiors are often printed that way.
Middle grade (roughly eight to twelve)
More atmosphere than cuteness. Think weather, texture, mood, and characters who look as though they have an inner life. A cover rough alongside a chapter-heading interior is a strong pairing.
Sequence and presentation
Treat the portfolio as a shape, not a pile. Open with your strongest character piece, group the rest by age band or project, and close with something personal that shows your taste. Twelve to twenty pieces is plenty; cut anything you would have to explain aloud.
For submissions, a single PDF is still the standard. Keep it under about 10MB, around 150–300dpi, RGB for screen and CMYK only if a publisher asks, and name the file properly: yourname_childrens-illustration_portfolio.pdf. Your website should do the same job in the same order, load quickly on a phone, and tell a visitor how to reach you.
Submitting without the guesswork
Check the guidelines on each agent's or publisher's website before you send anything — they differ, and following them is itself part of the application. Keep the covering email to three sentences: who you are, what you are sending, what you would like to happen next.
Directories such as the Children's Writers' & Artists' Yearbook and the Association of Illustrators remain sensible starting points for research, and portfolio reviews at illustration fairs are worth the queue. A discreet signature is fine; heavy watermarks make work harder to fall in love with. If a contract arrives, read it properly and take professional advice before signing — organisations such as the Society of Authors can help, and it is money well spent.
Keeping the portfolio alive
Set an easy rhythm. Add one new piece a month, revisit the whole portfolio twice a year, and delete the weakest image each time you add a stronger one. Keep a simple spreadsheet of who you sent what to, and when. Rejections are the normal weather of this work, not a verdict on your drawing.
Then go back to the thing that matters: draw the same character again tomorrow, in a new situation, and see whether they still look like themselves.
