Sizes:

• X-Small (UK 6/8) (snugger fit) – width 70cm
• Small (UK 8/10)– width 75cm
• Medium (UK 12/14) – width 80cm
• Large (UK 16)– width 85cm
• Large (UK 18 – width 90cm  

Hook: 4mm
I WOULD STRONGLY RECOMMEND CHECKING THE GAUGE BEFORE STARTING

Gauge: 10cm = 18 Sts x 14 Rows (Working in Hdc)
 
Yarn: DK Cotton

Yarn used: Wendy Supreme Luxury Cotton DK in Flame (1971)

https://www.lovecrafts.com/en-gb/p/wendy-supreme-luxury-c...
 
Amount required: 
Small: x 2 balls approx. (100g ball) (219yards per 100g) 
Med: x 3 balls approx. (100g ball)
Large: x 3/4 balls approx. (100g ball)
X Large: x4 balls approx. (100g ball)
 
Additional Supplies:
Buttons (approx. 1.5cm, dependent on button hole size).

X-Small-medium: 9/10 buttons (I made 10 holes for size small, but decided not to sew the top button on and have it more open)
Large & X-Large: 10/11 buttons (see note above)
 
Key:
St Stitch
Ch Chain
Sp Space
Sc Single Crochet
Hdc Half Double Crochet
Hdc2tog Half Double Crochet Two Stitches Together
Dc Double Crochet
Sk Skip stitch
WS Wrong Side
RS Right Side
{{ }} Total stitches
( ) Additional Sizes – small, medium, large & X-large

The photos are for size small (top with sleeves is X-Small)
 
All my patterns use US terminology
 
This top is worked in one piece from the bottom up.
(So no side seam sewing, yay!)