Pilates 20 min work out, did you loose inche/weight?

im going to start it today and i was wondering if it will help me loose inches. i just had a baby 2mths ago and i need to loose 23 lbs to get back to normal size. im in american eagle size 8 and usta be in size 6. i need to get back in those 6's. help me. i know it will help but what will it help most, inche or weight. have you used it, if so how much/many inches did you loose.