Fans searching for AOT keychains are buying small anime charms, and the useful comparison is materials and hardware rather than the artwork alone.
- Material and thickness: double-sided acrylic, hard enamel on metal, and soft PVC each wear differently against a bag.
- Hardware: swivel lobster clasp, split ring diameter, and chain length, which control how the charm hangs and spins.
- Print method and protective coating, since UV-printed acrylic scuffs faster when no clear layer is mentioned.
Treat licensing as unconfirmed until the seller states it, and read the description for measurements in inches and how many charms one order includes.