Joni - flip the side flaps up then pull the front of the helmet (like you are trying to pull the cage off), this should make it larger, push the forehead part toward the back to make it smaller. I have the same helmet so if you still have problems give me a shout.
Joni - flip the side flaps up then pull the front of the helmet (like you are trying to pull the cage off), this should make it larger, push the forehead part toward the back to make it smaller. I have the same helmet so if you still have problems give me a shout.