Ordered a custom top and it was great! For reference I'm 175cm tall, 65kg and bust size US 32G (EU70I) and bought a size L.
Size ordered: Small
H: 5'0
W:117
Not super tight but, very fitted. Which is exactly how I wanted it. True to size if you go by size chart! Great quality shirt, 95% cotton and 5% spandex so it has just enough stretch. Although, shipping did take around 2 weeks. Great overall if you don't mind the shipping time!