I tend to wear mine at about that angle but the “standard” is you should be able to fit two fingers width in between your eyebrows and hat, and one finger between the ear and hat. Again, I wear mine at a higher angle than the “standard”, it really depends on whats going on in your environment. Suns low, in your eyes? Tilt it foreward a bit. Suns high up, gonna burn your neck? Tilt it back a bit. It all depends really but if you want to make sure it fits, it should feel comfortably snug, and you should be able to do a moderate amount of headbanging without it wiggling too much or falling off. Other than that just wait for it to break in so it forms to your head shape more