These adorable bandannas are made with cotton fabric and the edges are hemmed. These are made to be tied around the neck. Please measure your pup(s) neck and leave a little room so it is not to snug. The measurements are on the size options and the width at the top of the bandanna so the neck should be about 2 inches smaller to be able to tie them. Don’t forget to leave a little slack when measuring so it’s not to tight.