I was an 18 in denial - so probably a 20. I was 18 in elastic waist pants. According to those size tables I wear a 4 now, but I haven't bought clothes in a long time. I buy mostly S-M-L stuff and just pick the S. My only pair of jeans is a 6 and it is really baggy at the legs, butt, and hips. I had the waist tightened already.