After swearing at lots of more complicated patterns I've stuck to Mary Robinette Kowal's very simple pattern, which ties round the back of the head so no pinging off the ears and has gathered sides which help with fit. I absolutely hate making them, though (but I do need to make more this weekend so T has plenty to take to Belfast next week for socially distanced Mastermind).

I'm really curious to see what the university-supplied ones will be like!