I would usually fit 2x so I went to 3x. For me, I am really top heavy 42FF and it continues to ride up when I workout. Although, I did get a get sweat in, unfortunately I need a 4x to be comfortable.
It is a great idea, but needs alot more material and or stretch in the stomach area for plus size women. Honestly, I recommend this women in regular, petite and shorter torsos.