As for the size of Furoshiki, their lengths were found to be different from each other, which means their shapes were not a regular square, because from old times Furoshiki was made by cutting one Tan (width of approx. 35cm～40cm and length of approx. 12m) of textile into pieces without incurring waste and sewing them.
風呂敷の大きさは、古くから織物の一反（幅約35cm～40cm、長さ約12m）を利用して無駄無く裁断し縫製するため、若干の長短があって正方形ではなかった。