Two Acer S271HL reviewers mentioned that this PC monitor was thin. In November this year K. S. Gladwin mentioned on Amazon “If you're familiar with Acer's line of S271HL range then you'll know they switched from a thick bezel to a nice looking thin one around about 2015” in their Acer S271HL review. K. S. Gladwin also mentioned “Whilst I prefer the aesthetically pleasing thinner one, my disappointment is offset by the 1ms refresh rate as opposed to the 6ms on the previous models”.
One Acer S271HL owner who purchased this PC monitor thought it was thick. K. S. Gladwin said “This is a brand new model, my one in particular being manufactured in January 2016 and it has the old style thicker bezel” in their review of this PC monitor.