Seamless! Not just the jumper but what I thought to myself looking at the second image in Photoshop. Cue rimshot. In any case here’s a cute lil’ pattern that is indeed worked in one piece, though you’ll still have to set the sleeves in (unless you pick them up and knit them, which is totally feasible as they’re knit top-down). The band’s an interesting point- it’s knit ‘diagonally’, creating squares in miter style. If you’d prefer a tunic to a blouse-y look, simply omit the elastic band used to pull in the back.