You will need two buttons for the sweater. Sirdar used their buttons # B5611-0902.
You will also need stitch holders and double-pointed needles size US 3 (3.25 mm) for the I-Cord on the trousers.

Finished measurements:
Sweater
Chest circumference: 18(19.75, 21.25, 21.75, 22.5, 24)“ 46(50, 54, 55, 57, 61) cm
Finished length: 9.75(10.75, 11.75, 12.5, 13.5, 14)” 25(27, 30, 32, 34, 36) cm
Sleeve to underarm: 6.25(6.5, 7, 8, 8.75, 9.75)“ 16(17, 18, 20, 22, 25) cm

Trousers
Hip circumference: 18.5(19.25, 20, 21, 21.75, 2)“ 47(49, 51, 53, 55, 56) cm
Full length: 13.5(14.5, 15.5, 16.5, 17.75, 19.25)” 34(37, 39, 42, 45, 49) cm
Inseam: 6.25(7, 8, 9, 9.75, 11)“ 16(18, 20, 23, 25, 28) cm

Yarn used:
Sirdar Snuggly DK
MC Shade 516 Treasure
Sweater - 2(2, 3, 3, 3, 4) balls
Trousers - 2(2, 2, 2, 2, 3) balls

You will also need oddments of shades 514 Squirrel, 445 Rice Pud, 419 Choo Choo Train and 510 Rosebud in DK yarn for the duplicate stitch/ Swiss darning.