I'm after a lovely dressing gown, I'm 5'9 and size 18.
I really like wrap style dressing gown similar to the Rosie H-W cashmere/ cashmere mix ones in M&S sadly all sold out in my size (sorry can't work out how to link!)
The most important things for me are a long length, (at least calf length) and preferably in black or dark grey, with a sash belt. It doesn't have to be cashmere, jersey or a wool mix would be fine too, but I'm not a fan of shiny or really bulky fabrics.
Ideally I don't want to spend more than £125 but could be swayed!