These Memoi Spot on Basics Cotton Sweater Tights are in Baby and Toddler sizes.  They are model SP-3400B.  If you are looking for larger sizes check out the Girls section on the website and scroll down to Cotton Tights.  These are economical and have a good fit.  I heard from a customer that you should base the size to buy according to the weight on the size chart for this product and not upon the clothing size of the baby.  For the ribbed version of this product check out the SP-3405 model under the baby tights section.  70% Cotton, 28% Polyester, and 2% Spandex.