The quality of these leggings seems great; however, they are way too skinny for the size.  We ordered a pair in size 18-24 months for our daughter, who was wearing almost all 12-18 mo clothing at the time.  I laughed out loud when I took these out of the package.  The length does seem correct, but the width is similar to her 9 or 12 month pants.  They are pretty stretchy.  If you have an extra long and lean girl, these may be for you; otherwise they may be too slim.