You will need stitch holders and a length of 3/4” (20 mm) elastic for the pants.

Finished measurements:
Chest circumference: 19( 22, 25.25, 28.25)“ 48( 56, 64, 72) cm
Finished length: 9.75 ( 11, 13.5, 15.5)” 25( 28, 34, 39) cm
Sleeve seam: 1(1, 1.25, 1.25)“ 2.5(2.5,3, 3) cm

Pants
Hip circumference: 20.5( 21.25, 22.75, 24.5)“ 52( 54, 58, 62) cm
Length to crotch: 7(7 ,8, 8.75)” 18(18, 20, 22) cm
Waist circumference: 18( 19, 20.5, 22)“ 46( 48, 52, 56) cm
Leg opening drop: 4.25( 4.25, 4.75, 5.25)” 11(11, 12, 13) cm

Yarn used:
Sirdar Snuggly 2 Ply
Dress
Shade 251 White - 1(1, 2, 2) balls
Pants
Shade 251 White - 1 ball