I clicked on this because I'm a 30-something but not a mum.
Monday to Friday I'm an office worker. In the house, I'm a slob or a PJ wearer if no guests. I suspect I'm not alone in that.
For weekends / casual nights out I wear shock horror skinny or slightly bootcut jeans, fitted jersey tops, cashmere sweaters and Ugg boots at this time of year. (I do have both flat comfy ones for walking and more stylish wedge ones if I want to be a bit smarter, but still casual).
Who knew I was mumsy without giving birth? Having said that, outwith year one (where tbf most of my mum friends and their DPs have understandably been a bit less groomed than usual!) I doubt you could tell the difference between the mums of little ones / mums of teens / mums of grown up and non-mums on a night out.
Size matters too. At barely 5" and 2 stone overweight but with a thin waist, I will not be walking out in denim shorts and thick tights any time soon, not those Paisley print leggings that seem to be popular. I wouldn't look a great deal worse than many I've seen in it, but being a bit overweight, I'd prefer to make my mark with those single colour sweaters she doesn't like. I've had a load of compliments when wear my bright blue / pink cashmere sweaters with jeans on dress down day.