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Preparing your files

Artwork requirements

Most rejected jobs are rejected for one of four reasons: not enough resolution, artwork sized past the printable area, too many colours for the method, or type that was never outlined. All four are avoidable, and all four are described here.

Last updated August 11, 2026

01File formats

FormatGood forNotes
SVGLogos, wordmarks, flat shapesBest option. Scales to any size with no resolution limit. Outline your type first.
PDFVector artwork out of a design applicationEmbed or outline all fonts. Flatten transparency effects.
PNGRaster artwork that needs a transparent backgroundSupply it at final print size at 300 DPI where you can.
JPEGPhotographsNo transparency, so the whole rectangle prints, including its white ground. Use PNG if you need the background to drop out.

Maximum file size is 40 MB. If yours is larger, contact us and we will give you somewhere to send it.

02Resolution

Resolution only means anything alongside a printed size. A 1,200 pixel wide file is 300 DPI at 4 inches wide and 100 DPI at 12 inches wide, and only one of those will look right.

  • 300 DPI at final print size is what we would like.
  • 150 DPI is our floor. The studio warns you below this, and it will still let you order, because a soft edge on a large simple shape is sometimes acceptable and you are the one who decides.
  • Vector files have no resolution. An SVG or a vector PDF is sharp at any size, which is why they are the best thing to send.

The studio shows the effective resolution live as you resize the artwork, so you can see exactly where it drops below 150.

03Size, bleed and safety

Diagram of an artwork sheet showing bleed area, trim line and safety zone as concentric dashed frames, with a magnified comparison of a low resolution and high resolution corner
  • Printable area is set by the garment position. Every one is published on the product page and drawn to scale.
  • Method maximum is set by the process. Embroidery works to 4 by 4 inches regardless of how much room the garment has.
  • The smaller of the two applies, and the studio tells you which one it used.
  • Safety margin is 6 percent inside the printable area. Anything crossing it risks landing on a seam, a hem or a pocket edge.
  • Registration tolerance on press is plus or minus 3 mm. Design so that 3 mm of movement does not break the layout.

Sublimation is the exception, because it prints across a whole panel. There, artwork should extend past the panel edge so that no unprinted strip appears at the seam.

04Transparent backgrounds

If your file has an opaque background, the whole rectangle prints. A logo saved as a JPEG on a white square becomes a white square on a navy shirt.

Save as PNG or SVG with a genuinely transparent background. The studio detects transparency on upload and tells you which one you have, so this is caught before you order rather than after.

A near-white background is not transparent. Neither is a checkerboard pattern that was flattened on export. Check in an application that shows transparency before you send it.

05Type and fonts

  • Outline your type, or embed the font in the PDF. If we do not have the font, an unoutlined file substitutes something else and you will not like the result.
  • Minimum sizes. Screen and transfer methods hold type down to about 6 pt. Embroidery needs 5 mm cap height as an absolute floor, and reads better at 7 mm. On open mesh, nothing under 1 inch tall survives the holes.
  • Font licensing is yours to hold. Many free fonts exclude commercial use or use on goods for resale. Check the licence covers what you are doing, because the rights warranty you give us at checkout covers typefaces as well as images.
  • If you set type in our studio instead of uploading a file, licensing is our problem and not yours. Both typefaces offered there are licensed for this use.

06Colour, and why it is an approximation

Comparison sheet showing emitted screen colour swatches beside flat printed ink swatches, with fine connecting lines indicating a slight shift between each pair

A colour on your screen and the same colour printed in ink will not be identical, and we do not promise that they will be. A screen emits light and mixes it additively. Ink sits on cloth and reflects whatever light is in the room. They are different physical systems, and no amount of care closes the gap completely.

What we do instead:

  • We work to a nominated reference. Give us a Pantone reference and we mix to it. The result is a close approximation of that reference on that fabric, and we describe it that way rather than calling it a match.
  • We tell you where a fabric will shift it. Heather grounds, tri-blends and dark garments requiring a white underbase all move a colour, and the amount is different on each. The product page says so before you order.
  • We offer a proof piece. If colour is critical, a single unit printed on the real press is the only way to see it before you commit to a batch. Configure a proof piece

Colour variation inside this normal range is not a defect and is not a valid return. Printing that does not match the file you supplied is, and we deal with it under the returns policy.

07What each method needs

MethodPreferred fileColour ceilingMaximum size
Screen PrintVector, SVG or PDF6 maximum12 x 16 in
DTG Direct-to-GarmentPNG at 300 DPI, or vectorFull colour12 x 16 in
DTF Transfer FilmPNG at 300 DPI, or vectorFull colour11 x 14 in
EmbroideryVector, SVG or PDF12 maximum4 x 4 in
Heat Transfer VinylVector, SVG or PDF3 maximum11 x 14 in
SublimationPNG at 300 DPI, or vectorFull colour16 x 20 in

08What we check, and what we do not

Automatically, as you configure: effective resolution at the printed size, printed size against both the garment and the method limit, colour count against the method ceiling, and whether the background is transparent.

By a person, before printing: whether the artwork falls into any category on our acceptable artwork rules, whether the file is technically printable, and whether anything about the job looks like it will disappoint you. If it does, we email you before we print, not after.

What we do not check: spelling, grammar, dates and names. We print exactly what you supply. Read it twice.

Not sure about a file? Send it to support@designbyuapparel.shop before you order and we will look at it and tell you what we think.