QR Codes on Clothing

Placement decides whether it scans

The best positions on a garment are the ones that stay flat and stay still:

• Upper back, between the shoulder blades. The flattest large area on a worn shirt and the easiest to photograph from behind. This is the position that works on staff uniforms and event crew tees.
• Left chest. Small and stable, but it sits over a curve and gets scanned at conversational distance, which is socially awkward. Keep it for a code people scan on the hanger rather than on a body.
• Sleeve. Almost never works on a worn garment. Too much curvature.
• Hem and care label. Excellent, because it is scanned off the body. Care instructions, material sourcing and washing guidance belong here.
• Hang tag. The most reliable of all. Card stock, flat, and in the buyer's hand at the moment of decision.

Stretch is the failure nobody predicts

Jersey stretches, and a print stretches with it. A code that decodes on the flat garment can fail once the shirt is on a person, because the modules are no longer square.

• Prefer woven and non-stretch fabrics for on-body codes: canvas tote, denim jacket back, structured cap, workwear.
• On jersey, oversize to 8 to 10 cm so the pattern survives some distortion.
• Avoid ribbed and textured knits entirely. The surface itself carries a competing pattern.

Printing method changes the result

• Screen print gives the crispest edges and the best contrast. Best choice for a code.
• DTG is acceptable at 8 cm and up, but ink sinks into the fibres and softens module edges, so go larger than you think.
• Embroidery is the hardest. Stitches cannot hold a sharp small module. Below about 12 cm it is not worth attempting, and even then the thread should be high-contrast and flat, never metallic.
• Vinyl transfer is sharp but glossy. It reflects light exactly like laminated paper does.
• Sublimation on polyester works well and survives washing better than the alternatives.

Whichever method, print dark on light. Inverted codes, light modules on a black shirt, are readable by modern phones but noticeably slower, and slow is the same as failed when the wearer walks away.

What merch codes should open

The garment is the ad. The scan is the conversion, and it should not land on a homepage:

• A music profile for a band tee, which is the single most effective merch code there is
• A multi-link page for a creator, covering socials, shop and mailing list
• The event page on crew and volunteer shirts, so a stranger asking what is happening gets an answer without asking
• A staff profile or booking page on uniform polos in hospitality and services
• Provenance and care on the inside label, which is fast becoming a textile compliance expectation rather than a marketing extra

Keep it dynamic. A shirt lasts years and an album cycle lasts months.