This cover shows the twelve pentominoes fitted together as a rectangle which wraps round to form a cylinder.

Pentominoes are the shapes you can make by arranging four squares together.

You will need approximately 5 metres/yards in each colour and 15 metres/yards for the top.

The ebook contains patterns for eleven knit and crochet toilet roll covers based on mathematical concepts. It also has a section that will help you to design your own covers.

The patterns are not available individually but if you want just one I can supply it in return for a small donation to my favourite charity.