The GS5 is only a fraction larger than the Galaxy S4 -- 5.1 inches versus the GS4's 5-inch display. This new phone, too, has a 1080p HD AMOLED display, so the screen's pixel density will be just a breath looser, though you'll never notice the difference.
The Galaxy S5 measures 142mm by 72.5mm by 8.1mm -- or 5.59 inches tall by 2.85 inches wide by 0.32-inch deep -- and weighs 145 grams, or 5.1 ounces. It's taller and heavier than the Galaxy S4 as a result of its extra hardware.
Break out the supersoakers, kids. Feedback about the waterproof Galaxy S4 Active prompted Samsung to make the Galaxy S5 waterproof and dust-proof in alliance with military spec IP67, which means that it can take a bath for up to 30 minutes at about 3 feet down