that looks similar to the Poetic skin/case I had on my 6s a year or so ago. On my GS7 I am using a Spigen that is minimal and I love it.
It's currently unavailable but this is it - Galaxy S7 Case, Spigen® [Thin Fit] Exact-Fit [Black] Premium Matte Finish Hard Case for Samsung Galaxy S7 (2016) - (555CS20003) https://www.amazon.com/dp/B01A7ICRLO/ref=cm_sw_r_other_awd_ggb8wbW85S56D
have this one for my s7 but it's the exact for model that has the phone exposed at top and bottom so it's even more minimal. love it cause it's very matte and adds grip to the very slippery glass back and adds basic protection. wireless charging works too FYI...
http://www.amazon.com/gp/product/B01A7ICRLO?psc=1&redirect=true&ref_=oh_aui_detailpage_o00_s00