Modern Pixie Sweater is worked from the top down and is completely seamless.
I have used an amazing technique developed by Susie Myers, “contiguous set-in sleeves”, that allows shoulder shaping without using short rows.

Size/ Chest Measurement/Yardage

18m/ 20”/300
24m/ 21”/325
3T/ 22”/375
4T/ 23”/450
5T/ 24”/475
6-7 /25”/ 500
8-9/ 26”/ 550
9-10 /27”/ 600
10-12/ 29”/650
12-14/ 30”/725

Notions:

US # 8/ 5.0 mm circular needles (40 cm and 60 cm or 80 cm);
US #9/5.5 mm circular needles (60 or 80 cm);
2 stitch markers A and 1 marker B;
Tapestry needle;
Lengths of waste yarn/stitch holder;
Optional 2-3 buttons (1 inch wide).