Full Back Print

Race directors and brewery owners ask for full back print more than almost any other placement, because the back panel is the single largest flat surface a printer has to work with. Shops typically size these designs 12 to 14 inches wide by 14 to 16 inches tall, and unlike a full front, the top of the artwork starts just 1.5 to 2 inches below the collar seam rather than several inches down, since there's no neckline to work around.

On crew shirts and event tees printed on blanks like the Next Level 3600 or Gildan G640, that positioning puts the design right under the yoke, exactly where a logo or a sponsor list needs to sit to stay legible from a few feet away. A 5K shirt with 40 sponsor names crammed into a back print only works because the artist built the type at a size that survives screen printing's mesh count, not because the space is infinite.

Setting the top of the design 1.5 to 2 inches under the collar seam is the standard convention: any higher and the print catches on the neck tape during the press cycle, any lower and the design looks like it's sliding off the shirt. Pros also keep the design a half-inch or so inboard of the side seams, since the back panel curves slightly at the edges once it's on a body.

The common mistake is assuming full back print can run edge to edge, sleeve seam to sleeve seam. It can't. The panel's actual flat, printable width sits closer to 14 inches on most adult tees before the fabric starts curving toward the side seam, so a design built at 18 inches wide for a mockup will crowd or wrinkle in production even though it looked fine on screen.