Designing the card was never the problem. The file the printer sends back is. 3mm bleed, crop marks, real text.
Building and checking it here is free. One credit downloads the file, clean.
Bleed and crop marks: 3mm
United States and Canada
Bleed and crop marks: 3mm
Bleed and crop marks: 3mm
This is the example card. Put your own details in and the print file becomes yours.
Ready to send
The file is exported in RGB, and almost every online printer converts it on receipt. Converting to CMYK properly needs an ICC profile matched to the press and the paper; doing it approximately shifts every colour, which is worse than letting the printer do it. If your printer asks for CMYK specifically, send them this file and ask which profile they want.
Canva, Adobe and Vistaprint all give away a business card designer, and they are good at it. Designing the card was never where this goes wrong.
Where it goes wrong is the file. A printer needs the artwork to run 3mm past the edge on every side, because the guillotine that cuts a stack of five hundred cards moves by a fraction of a millimetre and without that margin you get a white sliver down one edge. They need crop marks showing where the cut goes. They need the text to be text rather than a picture of text. A free export from a design tool usually has none of that, so the order either comes back or gets cropped into.
So this is a card designer measured in millimetres. The preview is shown at actual physical size with the bleed and the safe area drawn on it, the check names the specific reasons a printer would send the file back, and the export is the trim size plus bleed with marks, front and back on separate pages.
Pick the size where you are
85 by 55mm across Europe and Türkiye, 3.5 by 2 inches in the United States and Canada. A card cut to the wrong standard does not fit the wallet it is going into.
Fill it in and pick a look
Name, title, company, the ways to reach you. Four layouts and a set of palettes chosen for contrast, because a pale grey that looks refined on a screen disappears on paper.
Read it at actual size
The preview is a real 85 by 55mm on your screen, with the bleed and the safe area marked. Seeing 3mm as an actual 3mm is what makes the setting mean something.
Export the print file
Trim size plus 3mm of bleed on every edge, crop marks outside it, front and back as separate pages, and the text as text. That is the file an online printer's upload form is expecting.
None of this is about the design. It is about whether the order goes through.
Typical free export
Here
Each of these is a reason a real print order gets rejected or comes back wrong, and each is measurable in millimetres.
Contact QR that adds you to their phone
The back can carry a vCard QR. Scanning it saves your name, title, phone, email and website into the reader's contacts, rather than opening a website they will forget. Drawn as vector squares with the quiet zone the spec requires, so it scans off a printed card and not just a screen.
No bleed
The single most common rejection. Without 3mm of artwork past the trim, a stack of cards cut together comes out with a white edge on some of them.
A line wider than the safe area
Anything within 4mm of the cut is at risk. A long web address is usually the culprit, and it is the one thing on the card that has to be readable.
Text and card too close in tone
Screens are backlit and paper is not. Contrast that looks elegant on a monitor can be genuinely hard to read on an uncoated stock.
Type below about 6pt
Offset printing fills in the counters of small letters. Nothing here is set below 6.4pt for that reason.
Too many lines of contact detail
Four is what a card holds comfortably. A fifth makes the whole thing look crowded and gets read less, not more.
A logo too small to print
A logo that looks fine on screen at 200 pixels wide is soft at print size. Six hundred pixels is the minimum worth using.
Why the file stays in RGB, and why that is the honest answer
Printers work in CMYK, and you will see tools advertise a CMYK export as a feature. Converting properly needs an ICC profile matched to the specific press and the specific paper, because the same file prints differently on a coated and an uncoated stock. Converting approximately, which is what a browser based tool can do, shifts every colour in the file, usually making them duller and slightly wrong in a way you only discover when the box arrives. That is worse than not converting, because it looks like the job was done. Almost every online printer converts on receipt using the profile for the press your job is going on, which is the conversion you actually want. So the export stays in RGB, the page says so, and if your printer asks specifically for CMYK the right move is to send this file and ask which profile they want. Telling you that is less impressive than a checkbox and more useful than one.
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