I have these in a size 24 and they fit SNUG! Size 23 would be great for ladies who are smaller than myself. I know Jen from Frmheadtotoe.com also has these in a size 23, and she's about 1 size small than myself:
http://www.ebay.com/itm/NWT-7-All-Mankind-olive-stretch-Gwenevere-Super-skinny-jean-sz-23-/190637923458?pt=US_CSA_WC_Jeans&hash=item2c62e7dc82The size 24's on me:
http://www.alterationsneeded.com/2012/01/spiked-necklace.html