QR codes on business cards: the size, the target and the mistakes

A business card gives you roughly 85 by 55 millimetres, most of which is already spoken for. The QR code gets about two centimetres in a corner, and the person scanning it is holding the card at arm's length in whatever light the room has.

Two centimetres and one attempt. Everything below follows from that.

The vCard-in-the-code mistake

The tempting option is to encode the contact details themselves. Scan, save, done — no page load, no network.

The problem is size. A vCard with a name, title, company, phone, email, website and address is several hundred characters, and QR module count grows with the data. That data at level M lands you in a version with a grid dense enough that, squeezed into two centimetres, individual modules approach the resolution of ordinary offset printing. It scans on your phone, on your desk, under a lamp. It fails at a conference.

The second problem is permanence. The card now contains your phone number in ink. A new number, a new role, a new company: reprint.

What length costs you

The relationship is mechanical, not a matter of taste. A QR symbol is a grid whose size steps up in versions as the payload grows, and at a fixed printed size, more modules means each module is smaller.

Encoded	Characters	Module size at 2 cm	Verdict
gc.mw/abcd	11	Comfortable	Scans across a table
yourcompany.com/team/priya-sharma	33	Getting tight	Usually fine, fails in poor light
Campaign URL with UTM tags	120+	Very tight	Do not print at this size
A full vCard	300+	Below reliable print resolution	Do not do this

This is the one place where the four characters a shortener saves you are visibly worth something.

Getting the print right

1. 1

   Create the link first, with an alias you would say aloud

   A short alias produces a smaller code. It also means someone who cannot scan can still type it.

2. 2

   Download the vector, not the image

   Add .svg to the link for print. The .qr suffix gives a PNG, which is for screens. A PNG placed in a card layout will be resampled by the printer and you will not like the result.

3. 3

   Keep the quiet zone

   Clear space all the way around the code, and do not let a border, a fold or a bleed edge encroach on it. This is the most common cause of a code that scans on screen and not on card.

4. 4

   Dark on light, always

   A light code on a dark card looks better and scans worse. Some readers handle inverted codes; enough do not that it is not worth the risk on something you print a thousand of.

5. 5

   Proof on actual card stock

   Not on office paper. Matt finish, at final size, scanned at arm's length by two different phones. Uncoated stock absorbs ink and thickens modules; gloss reflects a downlight straight across the code.

What you get afterwards that print alone does not

A code encoding a short link is a code you can measure. Scans arriving through a QR are recorded separately from ordinary clicks, so a link that lives on both your card and your email signature still tells you which one people use.

The numbers are usually humbling and worth knowing. A box of cards handed out at three events, producing eleven scans, is telling you something real about how business cards work now — and it costs nothing to find out.

It is also the reason to keep the destination alive. A card sits in a wallet for two years. Repoint the link when you change job, and the cards you handed out in 2026 still reach you.

The both-and answer

If the card also carries an NFC tag, put the same short link on both. Tap for the phones that cooperate, scan for the rest, and one destination to maintain. Neither should hold a frozen copy of your details.

For sizing, colour, the SVG for print and the branded options, see QR codes.