It can be frustrating when your favorite pair of jeans or pants no longer fit you like they used to. However, you don't have to go out immediately and buy a new pair of pants, and you don't even have to give up wearing the pair you already have. Instead, you can just take a hair tie and use it to fasten your pants without buttoning them all the way up.
Just slip one end of your hair tie around the button and thread the other end through the buttonhole and loop it back around to secure your favorite pair of jeans.