Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Gerber sizes run small!!!

My son is very small for his age - 5 months and only 11 lbs. - so these should fit him according to the sizes but they don't. None of the Gerber clothes have fit him - newborn was too small, 0-3 too small, 3-6 too small. They work fine and are comfortable but I would recommend buying the next size up for your little one.