When this tiny creature was first described it was thought to represent some parent form of the parrot order, however, it later [1] was reinvestigated and is now placed near the Passeriformes … near them, not among or in between them!  

My reconstruction is life sized, the bird here is nearly 12 cm long, the feathers, however, are not known, so are completely speculative!  

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References:

[1] Gerald Mayr: A reassessment of Eocene parrotlike fossils indicates a previously undetected radiation of zygodactyl stem group representatives of passerines (Passeriformes). Zoologica Scripta 44(6): 587–602. 2015  

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edited: 17.09.2018