DD is soon to be attending a ball organised by her Autism charity, it will be her first (and quite possibly only) formal ball and we are really struggling to find something she likes or thinks she will feel comfortable in. I am therefore appealing to the MN style gurus for help
DD - 24, size 12/14 (probably more a 14 in a dress), 5ft 6. Her ASD makes clothes shopping really difficult and overwhelming so I would like to try and narrow a couple down before hitting the shops. She is not a fan of online shopping as she prefers to try things on before buying (her ASD head tells her you dont buy something to send back 
Requirements - not sure really. She normally will only wear black (t shirts and leggings, not black as in goth!) although has ventured out in to a few paler colour t shirts. She wont wear anything that is remotely low cut, and doesnt do buttons or zips very well due to her poor fine motor skills. Budget probably around the £100 if that is at all possible, although can spend a little more if needed.
Thanks in advance!