The outgoing Sonia Rykiel designer is selling the 20-style range via her own e-commerce site and MatchesFashion.com.
The ailing French fashion brand has been granted two-months of protection by a French commercial court after filing for Chapter 7 bankruptcy in the US on April 16.
The designer, whose exit was announced on Monday, said that owners First Heritage Brands are in breach of contract. A representative for the company said she resigned.
This week, Ralph & Russo names Helen David as chief growth officer, while Sonia Rykiel creative director departs.
For its 50th anniversary, the brand embraced the lyricism of city life on a street named after the founding designer, showing signatures of the house successfully updated by Julie de Libran.