Cthulhu Warning Sign — Yellow, Ominous, Vector Art, Warning Sign, Person

1600 × 1200

Radioactive Symbol — Yellow, Warning, Vector Art

1280 × 1024

Warning Sign with Screw

1024 × 819

Biohazard Symbol — Red, Warning, Vector Art

1920 × 1200

Biohazard Symbol — Ominous

1280 × 800

Biohazard Symbol — Black, Ominous

960 × 800

Biohazard Symbol — Black, Ominous, Illustration

1600 × 900

Red Plus Sign

1280 × 1024

Yellow Smiley Face — Neutral, Vector Art, Eyes, Mouth, Black

1600 × 1200

Yellow Smiley Face — Neutral, Vector Art, Eyes, Mouth

1280 × 800

Giraffe Warning Sign

1440 × 900

Cthulhu Warning Sign — Yellow, Ominous, Vector Art, Warning Sign, Person, Tentacles, Black

1920 × 1200