I measured before I purchased and measured a 31.8. I bought a 32 and it was easily 3-4 inches too small. Ive worn a 32K for 15 years.

Cup wise it is fantastic. I put the girls in and they were fully covered and very comfortable and the straps are thicker but not miserable and wide.  Once I get the band size dialed in I think this bra is going to be amazing!