Design & Size – (Virtually) Identical Twins. Perhaps the biggest shock with the iPhoneSE is what it didn’t change: the design. The new smartphone is visually almost identical to the ageing iPhone 5S and even its measurements are virtually identical: 123.8 x 58.6 x 7.6 mm (4.87 x 2.31 x 0.30 in), 113g (3.99 oz)