I agree with the others, in that it seems rather strange, to want a dress shirt hemmed only 1/2". If it's a curved shirttail, it really isn't that difficult (the hem is "rolled", stitched, then pressed) but just makes no sense, as it's tucked in. Even if it's the type that's worn outside the pants, 1/2" too long isn't even noticeable. Eat a big meal and it's 1/2" shorter. Breathe in, it's 1/2" shorter. Raise arms, it's at least 1/2" shorter.