Spell Boulevard Denim Skirt, M but runs small imo

Super cute denim mini from Spell and the Gypsy, nwt, bought direct from Spell but it never fitted me right and got forgotten in the closet. Please check the measurements in the photos, I’m usually a Small in Spell and this fits me so I think it runs small. High waisted with plaited details on the front pockets, a slight flare and a gorgeous plaited fake belt, there’s a double button and zip closure at the front. I’ve seen lots of size small and xs for sale but no other mediums!