BC BeltsCanvas Web Belt Military Style with Black Buckle and Tip 56" Long Many Colors

My waist is 30". Is the buckle removable to cut shorter? What all options are available to shorten belt?

How wide is the belt?

Will this belt pass a metal detector? I have to pass through security at work and would like to not ahve to take my belt off everyday.

AWhat's the fiber—cotton, polyester, nylon?