Alexandra is wearing a Fendi oversized sweater, a Maison Michel hat and Balenciaga shoes.
You can shop the same shoes at My Theresa :
black and grey, belted on the front, with a trim, in neoprene and leather
BELTED ANKLE BOOTS
Otherwise, you can find two similar pairs of Balenciaga shoes :
a) black and grey, belted on the front, but without trim, in all leather and with different heel (at farfetch)
BALENCIAGA POINTED ANKLE BOOT
b) black and mustard, belted on the ankle, in neoprene and leather and with same heel (at My Theresa)
COLOR BLOCK ANKLE BOOTS
Alexandra is also wearing a Fendi sweater from the fall winter 2012/13 runway collection :
(credit : GoRunway)
This sweater is similar to the GISELLE DRESS
from the runway show too :
The hat Alexandra is wearing is by Maison Michel.
It seems she is wearing the Andre felt trilby
, available at Net-a-porter :
But you may find the very similar Rabbit-felt and velvet fedora
at the same place too : 
