You will need:
Surname, Initials of maker/designer. (Responsibility eg. maker or designer) (Year) Name of object. [Type of object] Place of Archive/Museum: Name of Archive/Museum. Catalogue/reference number.
Westwood, V. (designer) (1993) Platform shoes. [Shoes]. London: Victoria and Albert Museum. Museum no.: T.225:1,2-1993.
In-text citation: (Westwood, 1993)