Javier Calleja rose to art world prominence thanks to his instantly recognizable figurative works, which often feature squat, wide-eyed characters with exaggerated proportions. Calleja's practice spans painting, sculpture, and works on paper, as well as an array of editioned work and merchandise. Though he draws on personal experience and childhood memories to create his iconic characters, Calleja prefers not to explain his work, instead letting the observer “finish” the work with their own interpretations.
Calleja has shown at galleries in Madrid, Barcelona, New York, Paris, and Hong Kong, among other major cities. A number of public collections throughout Spain have acquired his work. In March 2021, Calleja’s secondary-market record broke US$1 million for the first time, when his 2019 painting Waiting for a While sold for HK$8.8 million (US$1.1 million).