Both designs are worked in the round.

You will need circular needles in both sizes in a 16-24” length (40-60 cm) for the body of the sweater and smaller lengths, or double pointed needles for the hat and smaller parts of the sweater.

Finished measuremets:
Poncho
Chest circumference: 23.25( 24.75, 26, 27.25)“ 59( 63, 66, 69) cm
Finished length: 13.75( 15, 15.75, 16.5)” 35( 38, 40, 42) cm
Sleeve length: 1.25” ( 3 cm)

Hat
Circumference: 15.5( 15.75, 16, 17)“ 39( 40, 41, 43) cm
Depth (with ribbing turned back) - 7(7, 7, 7.5)” 18( 18, 18, 19) cm

Yarn used:
Hayfield Baby Blossom Chunky
Shade 373 Lily Pad -
Poncho - 2 balls for all sizes
Hat - 1 ball for all sizes