This is a set of clothes or accessories for figures.
Adapted from the GoodSmile website:
Here's the same outfit set that's included with the Nendoroid Doll Saber/Arthur Pendragon (Prototype): Costume Dress Outfit: -White Rose-! Mix and match it with your Nendoroid Dolls!
[Set Contents]:
Jacket
Slacks
Socks
Shoes (with magnets in soles)
The Nendoroid Doll and torso stand shown are not included.