I bought macom bra in extra small because I have a tiny waist, keep the same back size but just choose a few cup sizes bigger. I asked my surgeon. You can as the nurse aswell.
I bought a cute zebra zip front sports bra aswell from m&s Which ok il be wearing to swap when macom in the wash. Even tho wount be using either of tthem first few days as I will have strappings! Ergh lol but ye hope this helped xx