This a beautiful tech wallet. This has 6 card slots and an ID window.  Small coin pouch and a section for cash.  I currently have a Samsung Galaxy S8 Plus. The phone holder will hold the S8 plus with out a case on it.  It will hold the phone with a thin case (tech21) on it, but you will need to wiggle the phone out with the case. The phone will not fit with an otterbox of similar full protection case on it.
If you have a smaller phone you should have no problem with this!  I've had this for about a week now, and I love it!  Grab it and on my way I go!  With my essentials.  Hope this review helps!