Ringke Slim ($8)
Another well-trusted brand for cases is Ringke. Each case from this company is extremely thin, durable and affordable.
Here we're recommending the Ringke Slim. It has a soft TPU inside with a strong and durable polycarbonate hard plastic shell. It shouldn't add too much thickness to the Galaxy S8+, yet protects it from damage during drops. Including an extra few millimeters around the big 6.2-inch screen, keeping it strong and slim.
Buy it Now on Amazon for $7.99 in multiple colors