I bought that dress this morning as well, Miffy, have also been stalking for an M!
I am also a bit Phew as I washed my floral crops, my monacos and my Cos striped dress yesterday, all for the first time, and have just done the ironing. Nothing has shrunk/twisted/faded/bobbled, I was convinced after the sad demise of my wide leg contrast trim trousers that everything might be unwearable after one wash. As a celebratation, I also ordered the green floral ones as they appeared in a 10 and they will be perfect for holiday cover up trousers.
The double star is lovely, Miffy, isn’t it. Like you, I wear mine almost constantly. It goes with everything.