I've just completed a test knit for Kelly Brooker. It's a cute little slim fit sweater with lace cap sleeves. It's written in 3 yarn weights (fingering, DK and worsted) and 16 sizes (newborn to 10 years) so a wonderful pattern as to be expected from Kelly.
I knit the 50 cm (18-24 months) size in Sublime Baby Cashmere Merino Silk in shade 346 Dusty Pink. It took a little under 2 balls. Little lady is only 13 months but is a bit big for her age and as you can see this size fits nicely.