Gianfranco ferre straight leg pants

These pants are so cute but they don’t fit me in the waist anymore. Waist is 13” across, the fabric is very stretchy in the butt and thigh areas. I’m usually size 28 waist, and if you can see in the picture there’s an extra button on them which makes them fit me. The button is easily removable, if you want me to remove before I send let me know!