I knit this using inexpensive synthetic yarn from the 100 ￥ Shop. It took about 5.5 small skeins, and a few days of diligent knitting. I knit this up right after the move to Japan, so I wasn't working yet (which explains how fast it went).
This sweater might look familiar - I blogged about it on my Japan blog here. I ended up ironing a cute whale patch onto the front, and sending it to my niece, Celia, for her first Christmas.