Repetto Yellow Ballet Flats - Size 40 but fit like a 39 (US 8.5/9)

Brand new, never worn, Repetto ballet flats in a beautiful bright yellow. I am re-poshing them as they have come up small in size, I am usually a perfect size 40 (US 9.5/10), but these definitely fit like a 39. They are such lovely quality and made from beautiful leather, really sad they don’t fit.