From the ‘Piume Multicolore’ series designed by Aldo Londi and produced by Bitossi between 1955-1957. An unusual design for this maker only produced for such a short while. Very Scandinavian in style with possible inspiration coming from Stig Lindbergs ‘The Falling Leaves’ design, painted in shades of yellow, orange, green and blue with little orange feet. 

They are noticeable chips / glaze loss at both pointed ends of the rim. ( Please se photos.)

Height. 7.5-10cm (curved boat shapes so the low and high measurements are provided), 25.5cm long. internal Depth Roughly 5 to 8 cm  and 9 cm at its widest point.