I drew different characters on regular 12" (30cms) party balloons:
Kona Penguin, the Kona Ice mascot
Garr the dragon (copyright belongs to their owner)
Triken the triceratops, from anime Amagi Brilliant Park
Niumawang, from Chinese anime "Go Calf, Go"
Link
CobraIcarus
Papa Garr Redstar!!!!!!!!!!!!!!!