Passed the viva? A thank-you for your PhD supervisor: a photo from your years in the lab as a jigsaw, with your note at the end

Written by the team behind Puzzlify. Puzzlify is our product, so weigh what follows with that in mind. We've tried to make this useful even if you never use it.

You passed the viva, or defended the thesis, and after years of drafts, chapter meetings and comments in the margin, the person who got you there is suddenly not someone you'll see every week. Many new doctors want to thank their supervisor or mentor properly, and then get stuck: a mug feels too small, an expensive gift feels wrong in an academic setting, and if you've already moved city or country for a postdoc or a new job, there's no office door left to knock on.

This post is about one small, personal way to say thank you: a photo from your years in the lab, the department or the field, sent as a jigsaw they put together in their browser, with your note waiting when the last piece clicks in. It costs very little, arrives instantly wherever either of you is, and doesn't add one more object to an already crowded office. Further down there's a list of ideas that have nothing to do with us, because the thank-yous supervisors remember most are usually the simplest.

First, a word on thanking a supervisor

Gifts in academia come with a few unwritten rules, and it helps to respect them:

• Wait until it's over. Anything given before the examiners have decided can look like pressure. After the viva, the defence, or the final corrections are accepted, a thank-you is just a thank-you.
• Keep it small. Many universities have gift policies, and most supervisors would be uncomfortable with anything costly. The value is in what you say, not what you spend.
• Be specific. "Thanks for everything" is kind; "thank you for the meeting where you told me chapter three was really two chapters" is unforgettable.
• Remember the others. A co-supervisor, a lab manager, a technician or a postdoc who taught you the method often did as much as anyone. They can get their own puzzle, or a line in the note.

Why a puzzle works for this

A doctorate is built piece by piece over years, and most of the pieces never make it into the thesis: failed runs, the archive trip where nothing turned up, the conference poster nobody visited. Handing your supervisor a photo that comes together one piece at a time is a small, slightly playful nod to that. It takes ten or twenty minutes, it can be done between marking and meetings, and the note at the end means your thank-you arrives at the exact moment the picture is complete.

Choosing the photo

Some ideas that tend to work:

• The group photo: the lab or research group at a summer barbecue, a retreat, or the Christmas lunch. Ask whoever took it for the original file.
• The field or the instrument: the dig site, the boat, the telescope dome, the archive reading room, the microscope you booked at 7 a.m. for a year.
• A conference moment: your first talk, the two of you in front of a poster, a dinner in a city you'd never have visited otherwise.
• The day itself: you and your supervisor after the viva or defence, the celebration drinks, the bound copy of the thesis on the desk.
• A thesis figure: if your work produced a striking image (a map, a micrograph, a plot with a story behind it), it can make a surprisingly good puzzle, especially for someone who knows exactly what it shows.

Use the original JPG from a phone or camera rather than a copy forwarded through a messaging app, which is usually compressed and looks soft when cut into pieces. If the best photo is printed and pinned on a corkboard, scan it or photograph it flat in daylight without glare. Pictures with distinct areas of colour (sky, a bright lab coat, a coloured poster) make better puzzles than a dim, cluttered shot.

Privacy and the optional PIN

The puzzle link is private and meant for the person you send it to. You can add an optional PIN, perhaps the year you started or a running joke from group meetings, so it stays between you. Two academic cautions: check that everyone in a group photo is happy to be included, and keep anything unpublished or confidential (unreleased data, a reviewer's comments, a collaborator's results, a patient or participant in shot) out of both the picture and the note.

How many pieces?

Think about how busy they are and which device they'll use. End of term and grant deadlines are not the moment for a 252-piece epic.

If in doubt, go smaller. A puzzle finished in one sitting feels better than one abandoned halfway through a week of marking.

Writing the note at the end

The note is the real gift, so it's worth a draft or two. Keep it warm, specific and short:

• "Four years, eleven drafts, one thesis. Thank you for reading every one of them."
• "Thank you for telling me to keep going the week I wanted to quit. I'm Dr. now, and that's partly your fault."
• "For every 'interesting, but what's the argument?' Thank you. I finally know."
• "You taught me how to do research and how to be decent while doing it. I'll try to pass both on."
• "To the best co-supervisor, lab manager and coffee machine a PhD student could ask for."

If the relationship was more formal, a single sincere sentence and your name is perfectly enough. If several students are thanking the same person at the end of a project, one shared note signed by everyone works well.

Timing it

The puzzle is a link, so the only real decision is when it lands. Good moments: the day after the viva or defence once the news has settled, the day your corrections are accepted, graduation day, or your last day in the department before you move on. If you've already left for a postdoc or a job in another time zone, aim for their morning rather than the middle of a teaching day. You can make the puzzle in advance and send it whenever the moment feels right.

Making one with Puzzlify

Here is how it works, plainly. You upload a JPG on the Puzzlify puzzle maker, choose a piece count (24, 48, 80, 130 or 252), add your note and an optional PIN, and preview the whole puzzle in your browser for free. You only pay when you publish the link to send it:

• 1 credit: €3.99
• 3 credits: €8.99 (handy if you also want to thank a co-supervisor and a lab manager)
• Plus: €14.99 a year for 10 credits

That keeps it comfortably within the "small gesture" range most university gift policies expect. Your supervisor opens the link in a browser on a phone, tablet or laptop. They don't need an account or an app, and there's nothing to install on a university machine. Photos aren't used to train AI and aren't shared with third parties.

Two honest caveats. First, this is digital only: Puzzlify doesn't print or post a cardboard puzzle. If you'd rather give something for their office shelf, a printed photo jigsaw, a framed group photo or a bound copy of your thesis with a handwritten dedication are good alternatives; allow time for printing and delivery, more across borders. Second, there are a few similarly named things online. Puzzlify (puzzlify.app) is not puzzlify.io, which is a chess-puzzle site, and it isn't connected to Puzzlit, Puzzly or Puzzify.

Other ways to thank a supervisor that don't involve us

A jigsaw is one idea among many. Some others that are often remembered longer than any gift:

• A real acknowledgements section. Specific, generous thanks in the thesis itself is permanent and costs nothing.
• A handwritten card with one concrete memory of something they did that changed your work.
• A signed copy of the bound thesis, or of the first paper you publish from it.
• Tell their head of department, or nominate them for a supervision or mentoring award if your university has one. For many academics this matters more than any present.
• Keep them posted. A short email a year from now about where the work led is a gift supervisors rarely get and always enjoy.
• Pay it forward: offer to talk to their next students about surviving the final year.

The point of it all

Most supervisors don't expect anything when a student finishes, which is exactly why a small, sincere thank-you can mean so much. If a photo from your years together, put together piece by piece with your note at the end, sounds like the right way to say it, you can try it free on the Puzzlify puzzle maker and only pay if you send it.

This post was written by the Puzzlify team. Puzzlify is our own product; we've tried to keep the advice useful whatever you decide to send.