If you wear a size 14 and up, I would order the plus size, as for me I have a large waist(37) inches, and only have a 10 inch overlap.  Also the 23 inch length is a bit short, as the hem seems to ride up and appears to be uneven in the hem, I so wish there was a mid size length.  I did order a plus size in the 36' length, and despite being 5 ft. tall its not too long if I wear a shoe with heels.  What I like about the longer length is the hem does not appear hiked up in the back