Martyn kindly suggested I open a thread on the above topic, but I doubt I have sufficient material to sustain such a thread.
I have had to the good fortune of being in contact with clothes which belonged to Nicholas, Alexandra, the children as well as other members of the Romanov family.
Most of Alexandra's gowns are now either in the Hermitage, the Armoury or at Pavlovsk. The only item of clothing which belonged to Alexandra which I have handled is a cream linen dressing gown - it is too structured to be described as a peignoir. It is decorated with an abstract, lilac, floral motif and is quite Japanese in influence.
Other clothing, I have 'met', is, I think wrongly, described as having belonged to Alexandra. This is a nurse's uniform - without the head scarf. The long dress is a denim grey and the apron is made from a very fine grey and blue gingham check.
The reason I think it has been misidentifed is because it would have been too small to fit Alexandra at that stage of her life. I think it was Tatiana's because it belonged to someone very, very slim and tall.
tsaria
PS: Anyone who has the book 'Nicholas & Alexandra - the family albums', could look at the photograph of Grand Duchess Marie on P.193. Marie is wearing a gown very similar to the Empress' described above, but the fabric has a much 'busier' pattern.