Anna Knight - Knitted Klein Bottle Hat

This is a knitted hat in the shape of a Klein bottle - a non-orientable surface which only truly exists in 4-dimensions. The number of rows of each colour also make the digits of Pi, including a very important "..." where is there is no room for more digits. This was inspired by Matt Parker: https://www.ravelry.com/patterns/library/klein-bottle-pi-hat

Anna is a Mathematics Undergraduate in the Mathematical Institute, University of Oxford.