Being a girl with long/thick hair, I go through more hair ties in one year than anybody should. I hate how damaging the elastic bands are to my hair so I started using fold over elastic a couple of years ago.
They are really simple to make!
5/8″ Fold over elastic
I buy my elastic from a wholesale distributor in China. I can get 5 yards for about $2.50-$3.00. To break it down for you..you pay on average 3-6 dollars at Target and Walmart for 4 of these hair ties. A specialty shop here in my town sells individual ones for $2.00 a piece. I can make 20 for $2.50 :) They make a net profit of over 60 cents per hair tie you buy.
So save yourself some money and make your own :)
Take the elastic and cut 9 inches. You might find you like more or less depending on how this your hair is. Mine is super thick so I make mine slightly larger so I can triple it when I put my hair in a ponytail.
So you cut, fold in half and knot the end :) so easy my grandma helps me make them.