The Radians do not go far into the ear canal and you can control how much goes by how your place the soft material in your ear to start.
If you look at my pictures, the top one shows that the beige do not protrude far and the last one shows how it covers the entire ear opening. In fact you could make the plugs and grind down or cut off the part that goes into the ear and I suspect they would still work.
Ive been using these http://www.earplugstore.com/silnatrubear.html for the last 3 years. Really quiet and pretty comfortable, well as comfortable as anything plastic stuffed in your ear can be.
