Here is the flag of Osielsko commune, in Bydgoszcz county in the voivodship
of Kujawsko-Pomorskie, as presented at the communal
website, adopted 1999.
Flagdescription: two equally wide vertical stripes green, yellow; in
center the communal arms. (the site doesn't specify the proportional size
of the arms)
Coat of Arms: impaled by dimidiation or an oak eradicated vert; vert a castletower
Jarig Bakker, 11 Apr 2008