Unisex Cotu Classic Trainers Trainers

Are these shoes for women or men and women?

It said free delivery and free returns why have i been charged delivery?

Will they stretch once worn? I’ve ordered a size 5 and size 5.5. I’m torn between which size to keep. 5.5 feel too big, but size 5 is a bit snug.

How flexible are the soles? Do they bend in half lengthwise and kinda roll up widthwise?