The Santiago range includes an armchair and footrest as well as a two-seater sofa, all of which are supported by short tubular legs, placed at the corners of the furniture. The seating is covered in pink or bright yellow fabric, and the feet are available as painted metal, ash or dyed walnut wood.
The furniture is framed by curved upholstered armrests, and a high back that slants forwards into the chair. The ottoman is oval-shaped, and covered in a patterned pink fabric to contrast the armchair.
"Soft and comfortable with a contemporary cut, Santiago armchairs and sofas play with unusual proportions to create a unique visual presence that changes depending on the point you watch them from," said the brand.
"From the side, the armrest appears small and irregular, while, as contrast, the backrest is high and triangular," it added.
The furniture is reminiscent of Claesson Koivisto Rune's earlier Kelly range of seating for Tacchini, which was made top-heavy by similarly tall chair backs. Its Highlife collection of furniture also played with proportions, featuring a series of sofas with differently sized interchangeable backs, that were designed to be grouped together.
The Santiago range is part of a Tacchini's 2016 collection, which also includes tables and fringed rugs designed by the studio, as well as furniture created by Italian architect Gianfranco Frattini, and designer Gordan Guillaumier.
The brand showcased the furniture at this year's Salone del Mobile furniture fair in Milan, which took place from 12 to 17 April 2016.
Also during Milan design week, Claesson Koivisto Rune unveiled furniture designed for Dutch brand Artifort, which referenced the work of Minimalist sculptor Donald Judd.
Its Smaller Objects label encourages entrepreneurial designers by allowing them to earn 75 per cent of the proceeds of their products, rather than the standard royalty of five per cent or less.
Photography is by Andrea Ferrari.