I love Gloria Vanderbilt Amanda jeans - I wear a size 6 in the blue denim colors.  But the black color is cut bigger for some reason (perhaps because it's made in a different country?) I discovered this after buying 2 different pairs of black size 6 jeans that did not fit (I thought the first one was a fluke).  I found a local store that carries size 4 in black, and they fit OK.  I asked the store attendant if they had received other comments about different colors being sized differently, and she said "yes".  I also discovered that a friend in a different part of the U.S. had the same problem with different sizing on different colors of jeans.  This certainly isn't a problem with Amazon - they are great!  It's a problem with Gloria Vanderbilt jeans.  However, they fit so nicely (and truly are "slimming" as the label claims) that it is worth learning which sizes you wear in which colors.