I ordered 6 items online from M&S. Only 1 fit me well. I am a true size 8 yet the trousers were really tight around waist. They had an elastic, which I thought would be a bonus, but it was sooo uncomfortable. Also some jeans I had bought before and which I love but these were different and not as good - tighter and narrower.
I did a collect in store so was able to return immediately but felt embarrassed doing so…