Measurements to get you best fit. 80% of women are wearing the wrong size bra, so actual measurements are best if you can measure over and under your breasts (see pic).
If you dont have a soft tape measure, a string or cord will work and use a regular tape measure to measure that.
You can also use a dollar bill (6 inches) to measure the cord/belt
I can send recommendations just on bra sizes, but please know for best fit measurements are recommended