This free pattern is just knitted in a rectangle shape and need to sew about 1.5" each side and ready to wear. It is also available for all sizes from 3 months old baby to extra large woman size. The price is just USD 3.99 and you can buy it in my store.
I also provided "How to knit step-by-step video" for this pattern on my YouTube channel and the link is included in the written pattern, PDF file.
21 sts x 30 rows = 4" x 4" in Stocking sts with US#6 (4 mm) needle