Maibulun Black Floral Slides

Women's Maibulun black & white floral slides. Two buckles on sides. Looks like Birkenstock slides. The mark inside says 2.5. I don't know what that is, but they measure 10 1/2" from the tip of toe to heel. My friend tried them on & they do fit like a 10 1/2. They have been worn but still have a lot of life left.