Optically a stunner, technically a flop

Had I ordered 4 of these C-style strings in different forms. Ordering and delivery were i. O. I can not report anything negative. What bothers me is the plastic bracket and the unit size. My genitals are certainly not the smallest, but as I am a slim guy otherwise, slips and wobbles or the thing does not sit really tight, as I had imagined. I would hope that it is available in different sizes, and especially that of the bracket should be of a more powerful, adjustable material, which then stays in shape and holds because I really think the Sexy C string from the idea ,