This is an ideal summer top, based on one that I bought and wore endlessly last year. It can be worn on its own or as a layer on slightly cooler days. It is a modern boxy shape and the fit is very loose. In the picture I am wearing the small which comes out at 46in giving me 10in of negative ease.
It is a simple 4 row pattern worked in the round to the armholes. I have only given the stitch tension as the length/ armhole are measured and therefore the number of rows to 4in is not critical.
This would be suitable for a lot of yarns but preferably something with a bit of drape such as cotton, bamboo or silk.