The diaper cover should measure 11”-11.5” in length, and 15” across for the waist band. The hat should be about 5.5” in length, and approximately 13.5”-14” around.

My hat is on gauge for the hat as given above by the designer. My diaper cover is on gauge for across the waistband, but my length was a little short. (10.5” ) I think it will work ok though.