Did you try font creator 6 also known as "high logic font creator"? To save a font you'll need a legit version so go download it at one of them legit sites everyone goes to *whistle* then just load it in and then Tools > Glyph Transformer > and at bottom it says "Outlines - Scale" with some %, put it to a % you think would be more suitable, If you go too big it might go outside the box so would need some adjusting in the other options.