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If you don't have any elastic or extra shoelaces for ties, you can make your own fabric ties by cutting a t-shirt. You will need t-shirts with little or no printing on them. While the video below states the tees cannot have side seams, since these are being cut for ties, as long as your shirt is at least 18" wide, it is fine.
Cut the t-shirt in horizontal strips (not including the hem) in 3/4 to 1 inch wide strips. Pull the strips so that the fabric curls.
Photos courtesy of Kelly White, 2020. Used by permission.
See the video below for more detailed instructions on making ties from t-shirts. For ties, one long continuous strip is not necessary and the tshirt can be cut from end to end.