This auction is for an old US Army Dress Uniform of a Specialst 5th Class including the hat. I do not know what infantry and I have not identified the shoulder patch. The pants are 34 Regular and the Jacket is 41 Regular. I do not know the hat size. This unifor is in overall good condition and both the Jacket and the Hat have all of the bottons and insignias. It only needs to be dry cleaned and it will make a great addition to your militaria collection.