New Bell Moto-10 Spherical Helmet - 2021 Fasthouse DITD Size Medium. I purchased this Helmet for Christmas, unfortunately it was the wrong size and didn’t fit. This helmet fits as a medium or large as long as you have the different size liners. I have both 35mm liner pads for helmet to fit as a large and 40mm pads to fit as a medium. This helmet size is sold out everywhere only size available online is a small. Items included in this purchase is Bell helmet bag and both sets of liners.