How about something which is being assessed on multiple dimensions?
A tee-shirt which is a distinct colour is unique.
A tee-shirt which is a distinct colour, distinct fit, distinct size and has a distinct motif could perhaps be described as being 'very unique'.
A tee-shirt which is a distinct colour is unique. A tee-shirt which is a distinct colour, distinct fit, distinct size and has a distinct motif could perhaps be described as being 'very unique'.