KEP Italia manufactures riding helmets with the outer shell available in two different sizes, M or L.
The medium (M) shell can be fitted with eight different sizes, from 51 to 58, while the large (L) shell accommodates sizes 59 to 62.

But the right size of the helmet is no enough; it must also fit the shape of the rider´s head.
For this reason, Kep Italia has created ten liners for oval head (typical in Europe), it is indicated as Round shape and twelve liners for narrow heads (typical in North America and Canada), and is indicated as Oval shape.

It is also possible to insert small separators into the helmet to adjust it to fit the rider´s head (which can be oval, round or egg-shaped). The filler pieces can be inserted on the front, back or on the sides of the helmet, on the inside of the riding helmet so that the fit is perfect.