When there are two buttons on a dress shirt sleeve, am I supposed to use: 1. The narrower button or 2. The wider button or 3. Whichever fits my wrist better? Also, I read on this forum that generally about 1/2 inch of sleeve should show when wearing a suit jacket (from hands at rest by side position I assume). I see some designers showing models with a full inch or even two inches showing! How much is really "acceptable" by "conventional" standards? Is one inch the maximum or is it 1/2 inch?