It takes approximately 1400 meters of yarn to make a simple sweater and at least twice that to knit a "fancy" one. It also takes 4pounds of clean fleece to make the yarn.
Fun fact I was originally going to have Japan be covered by his flag like North Korea to show him being isolated also as call back from when Hetalia Japan hid under a blanket when Hetalia America first visited him but I couldn't make it work with pose I wanted SatW Japan to make so I just scrapped the idea
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And yes That Bill wurtz history of japan video wwww!