Woman's open toe dressy shoes

Beautiful dressy woman's black pump shoes. Open toe. Never been worn but stayed in my closet for about 10 years. They are still in excellent condition, but unfortunately there's no size written on them and I don't have a box anymore. I'm size 7.5 and I can't barely fit in them , so I think they are size 6.5. My toes and the middle portion of my foot went in but not the heel when I tried them on, So I think they should be 6.5.