Black Bobbled Open Front Cotton Cardigan

The designer is simply called "Tu" and from googling it looks like it's sold at Sainsbury's in the UK. There is no size tag other than the number 20 next to the designer name, but that doesn't seem right so please refer to measurements below. I would say it's more of a M/L. 100% cotton black bobble cardigan, loose bracelet length sleeves, simple layering style without buttons or ties. Measurements for presumed size Medium: PTP, laid flat: 21" Total length: 23" Sleeve length: 17" Material Composition: 100% cotton