I just got a don hume IWB holster with metal clip. I thought your belt went between clip and holster. My belt won't fit thru without possibly bending the clip or making it stick out. When I attach the clip to my jeans with belt on outside every thing fits snug and comfortable and stays in place. My belt is not overly thick (aker B 21) Which is correct or is it a matter of what works for me. You would think as many holsters that I have in my box I would learn something.