This little phone buddy has a simplistic, but useful design. This particular version is 3.5" tall, but 4" and 4.5" versions are also available. The elastic and adjustable strap allow for generous size fudging, but pretty much any phone around 3.5" tall, excluding the antenna, will fit snug right on in there.
The inside is lined with soft goodness to play nice with your phone and won't scratch it up. The elastic sides work well for adjustability and hold, but also don't smash in buttons on the sides of most phones. The female part of the SRB is mounted directly on the holster so you only have to worry about the male strap when connecting and releasing. I wish there was a clever way to get the holder strap out of the way when releasing one's phone, but I find knocking it away to the side is not too bad. The holster comes with a beefy heavy duty spring steel clip that has a jet black power coat and can accommodate up to 2.25" belt loop. This clip has a great grip, but if you would like different mounting options, you can easily take it off and use the PALS webbing. A short Malice clip (sold separately) fits in there nicely or if you want to get a little wacky, one could thread a thin belt through there for a horizontal holster mount. Currently only available in Black and pictures show a Sony Z525a phone as a demo piece.