A Kimono fabric has only 33cm-36cm width (width of the Kimono bolt (roll)) . And I use 50cm for one scrunchie. So, I patch two pieces of Kimono fabric for one.
Of course you think I should take the 50cm from length not width so that I do not have to patch. But the fabric is much storonger to take it from width than length because of the fabric's weaving.