You will need 4(4, 4, 5, 5, 5) buttons for the cardigan. Sirdar used their buttons # 5611-0902.
You will need 2 buttons for the dungarees. Sirdar used their buttons # B5611-0485

You will also need stitch holders.

Finished measurements:
Chest circumference: 18(20, 21.25, 22, 22.75, 23.75)“ 46(51, 54, 56, 58, 60) 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

Yarn used:
Sirdar Snuggly DK
Cardigan
Shade 515 Tree House - 2(2, 2, 3, 3, 3) balls
Dungarees
Shade 477 Twinkle Toes - 2 (2, 2, 2, 2, 3) balls

“This adorable dungaree and cardigan set features a simple fauna inspired lace panel travelling up the centre of the dungarees. The top of the dungarees are knitted with rib running up the edges for a neat finish and the straps cross at the back and fasten at the front with a button. Rib is also used at the leg cuffs.

The cardigan also features the fauna inspired lace work across the body and up each sleeve. The sleeves are raglan set and are fully fashioned for a comfy fit.“