Old Helmet - Nike/Bauer 5500 Med, Bauer Re-akt 75 Med. New Helmet - True Dynamic Pro 9 - White/Medium Fit - I wear a medium in all brands. This helmet is supposed to fit both round and long shaped heads by using different thicknesses of padding in 3 areas, the back of the upper neck, and both temple areas. I have a more long front to back, than round. The stock padding is 5mm in the back, 6mm in the temples. For reference, the back padding options are: 5mm, 10mm, 15mm and the temples a