The pattern is a modular design of Horst Schulz. It’s published in his book “Das neue Stricken”, page 56 and in “Patchwork Knitting”.
You can make covers, afghans, clothing, assesories in all sizes depending on the yarn you want to use.

All kind of yarn can be used depending on the project you want to create.

There are no finished sizes of the garments but you create and join your project “on the go”. The book gives some hints to shape the garment and how to start.
It’s very helpful to make a paper pattern of a fitting garment.