From KnitRowan.com website -

This classic, round-neck cardigan, featuring button detail on the sleeves, has been knitted in Kidsilk Haze Vintage, our vintage look, Kidsilk Haze yarn. Designed by Sarah Hatton, the classic style of this cover-up makes it a perfect addition to any wardrobe.

Fitted cardigan with minimal ease, featuring long, set-in sleeves with cuffs.

11 x 15mm buttons needed for front and cuffs.