How to Get Your Artwork Print-Ready for Custom T-Shirts

Getting your artwork ready before you place a custom t-shirt order saves you time and avoids reprints. Most print problems come down to a handful of fixable file issues. This guide walks you through what printers actually need, so your design comes out looking exactly the way you pictured it.

File Format Matters More Than You Think

The file type you send is the first thing a printer checks. PNG and PDF files work well for most print methods. Vector files, usually saved as AI or EPS, are the gold standard because they scale to any size without losing sharpness.

JPEG files can work, but they compress every time you save them. That compression adds blurriness you won't notice on screen but you'll definitely see on fabric. If your only option is a JPEG, make sure it's a high-quality export at the largest size you have.

Avoid files pulled straight from a website. Screen images are built for 72 DPI, which is far too low for printing. You want 300 DPI at the actual print size.

Resolution: What 300 DPI Actually Means

DPI stands for dots per inch. At 72 DPI, a design looks fine on a monitor. At 300 DPI, it has enough detail to print cleanly on fabric.

Here's the catch. You can't just open a low-resolution file and change the DPI number in your settings. That doesn't add detail. It just stretches the existing pixels and makes the blurriness worse. You need the original file at a high resolution, or you need to recreate the artwork as a vector.

A good rule: if you're ordering a print that sits across the chest, your file should be at least 3500 x 4500 pixels at 300 DPI. For a small left-chest logo, 1500 x 1500 pixels is usually fine.

Colour Mode: RGB vs CMYK

Screens show colour in RGB. Printers work in CMYK. The two systems don't match perfectly, and some bright RGB colours don't have an exact CMYK equivalent.

For DTF printing and direct-to-garment methods, printers convert your file automatically. But if you care about hitting a specific brand colour, convert your file to CMYK before you send it. That way you see the actual printable colour in your design software before anything gets printed.

If you're ordering through a screen printing service, ask for a Pantone colour reference instead. Screen printing uses pre-mixed inks, and Pantone codes give you the most predictable colour match.

Transparent Backgrounds and Clean Edges

Send your artwork on a transparent background, not a white one. White backgrounds look invisible on screen but print as a white rectangle on the shirt. That's one of the most common mistakes printers see.

A PNG file with a transparent background (sometimes called "PNG-24") solves this. If you're working in a vector program, make sure no white fill is hiding behind your artwork.

Check your edges too. Artwork with rough, pixelated edges is hard to fix after the fact. If your design has text or fine lines, those need to be especially clean. Thin lines under 1pt often don't print reliably, so thicken them up if you can.

Size and Placement: Set This Before You Send

Printers need to know where you want your design placed and how big it should be. Don't leave this to guesswork.

Standard full-front prints on adult shirts sit between 25cm and 35cm wide. Left-chest logos are usually around 8cm to 10cm wide. Youth t-shirt printing and kids' sizes need smaller prints to stay in proportion with the garment.

A simple mockup helps. Even a rough sketch with measurements written on it tells the printer exactly what you want. Some customers send a photo of a shirt with the logo area marked. That works fine too.

If you're placing a bulk t-shirt printing order for a team or an event, consistency matters. Confirm the print position and size for every garment style in the order, because a size that looks right on an adult XL can sit awkwardly on a small.

Common Mistakes Worth Avoiding

A few things trip up customers regularly, and they're all easy to fix before you submit your order.

Sending a screenshot or photo of a logo instead of the original file
Using a file with text that hasn't been converted to outlines, so the font changes when the printer opens it
Forgetting to include bleed area on edge-to-edge designs
Sending artwork sized for a business card when you want a chest print

Converting text to outlines is worth flagging. If your design has custom fonts and you send an editable file, the printer's computer may not have your font installed. It substitutes a default and your text changes shape. Convert to outlines and the letters are locked in as shapes. No substitution possible.

Once your file ticks the boxes above, ordering is straightforward. If you're not sure your artwork is ready, most good printers will check it before they go to print and flag anything that needs fixing. Upload your design, confirm your placement, and get your shirts sorted.