Triangulate is a new pattern just released by Kelly Brooker which I was lucky enough to test knit. It's a beanie knit in sport weight yarn and with a very simple colourwork pattern. The pattern is for 12 sizes from newborn to adult large.
I used some MillaMia yarn which I liberated from my sister-in-laws stash (thanks E!). I knit the 50 cm and in total it used 40 g (~100 m) of the main navy colour and 16 g (~40 m) of the yellow contrast.
The little man had to be bribed with a chocolate bear to come out into a very cold and frosty December day for me to get some photos! Even at that the light wasn't the best and the photos don't show the colours up as well as they should!