Available sizes listed for the Sonic Halloween t-shirts are Small, Medium, Large, X-Large, 2X-Large, and 3X-Large.

Two main Halloween designs are shown: a purple-and-green “Scary Fast” design featuring vampire, evil-doctor, and pirate characters, and a “Trick or Treat” design with zombie, pirate, and evil-doctor characters. Both use slimy/spooky purple-and-green artwork and themed lettering.

The shirts are listed as 100% cotton. Care instructions recommend machine washing cold inside out with similar colors, tumble drying low or line/lay flat to dry, and note that hang-drying is recommended for best results.

The shirts are made-to-order and printed in the U.S.A. using digital direct-to-garment (DTG) printing with water-based inks.

The shirts are made-to-order, so customers should consider that when ordering multiple sizes. The listings also note printing is done in the U.S.A. using water-based inks.

Customers report that the shirts tend to run small and commonly advise ordering one size up.