Question: what is the difference between 38mm and 42mm in apple watch?
Answer: Display Size and Resolution According to Yahoo's David Pogue, the 38mm Watch will include a 1.5-inch display while the larger 42mm version ships with a 1.7-inch. Both version offer retina resolutions, but the 42mm packs more pixels with 312 x 390 pixels as compared to the 272 x 340 resolution of the 38mm model.