These suits are oversized to be worn over your regular riding gear, so buy the size you would normally wear. The elastic waist in the jacket and pants allow for a pretty good range of flexibility and keep the suit snug. If you are in between sizes, choose the larger. Here is a link to Joe Rocket’s size chart for women. Since the suits are over-sized to fit over gear, use your body measurements with the chart (don’t measure over gear and then use the chart).
Joe Rocket Women's RS-2 Two Piece Rainsuit
$80.99
Finally, a well tailored rain suit for women! We really liked the way the RS-2 rain suit for women looked when we took the studio pictures. Holly thought the jacket was "cute" on our Fit Check mannequin and we both liked the colors. The bullet points above do a good job of listing the features and then you can take the "Images" link above to see a lot of good close up pictures we took. The jacket of the suit has some good nighttime reflectives so we included some "night shots" to show you that as well. I really think you will like this suit and the price is reasonable.