Expect more sitings of 'mens skirts' because it's double usage.
Black t-shirt: Mens second hand/thrifted and cut off sleeves. Try Revolve. Skirt: Mens white shirt buttoned and tied (also second hand). Try Ashish or Shopbop. Shoes: Celine. Lookalikes by KG and Urban Outfitters (easy dye job). Clutch: Plasticland. Shades: Ray-Ban Foldable Wayfarers
As always skip the women's section. Get a mens shirt that's big so it doesn't hug when buttoned.
Aziza that First Aid clutch was too good. Love ya for sh*t like that ;-) See above for where I found them online.
Where to get this or similar: