That's a big phone
actually its smaller than my last
this isnt a side by side pic so it wont be accurate but thats roughly the size i see them when theyre next to each other anyway
my oneplus one has a 5.5 inch screen, but the galaxy s8 has 5.8, and the reason for that is the s8 has a longer aspect ratio and a much much larger screen to body ratio, but its actually shorter and thinner than the oneplus one if you look at them next to each other in real life
i actually took those pictures to compare the blacks of the displays but the picture also seemed to show them in scale