Guyver Helmet

Hi Sofedar, I found this awesome model here skuplted by D3v1lman (check out his skills wow : ) and thought it would be perfect for your project, The whole at the bottom is only 16cms wide so you will either need to in large it a little or dremel the sides a bit to perhaps get your head in. But I thought the current sizing looks good ; ) I split the original model and ended up with two different looking halfs that I duplicated both, mirrored and then rejoined together so there are some subtle differences between the two models I've uploaded so you have a couple of choices,
Good luck and do post some pics if and when you print it, Cheers Jace