A silver dress earns its drama by doing very little else, and that is exactly why it works. There is no need to accessorise your way to a party look when the fabric is already doing the shouting, so you can keep jewellery minimal and still look like you made an effort. The mistake is treating it like any other dress and piling on more shine, more sequins, more statement earrings, until you look like you are reflecting the room back at everyone in it.
It is not an everyday dress, and I would not try to make it one. Silver reads as occasion wear the second you put it on, so daytime errands, the office, a casual lunch, all the wrong settings, because the fabric wants low light and a bit of ceremony to look right rather than slightly mad. Where it genuinely falls short is in harsh daylight, where cheaper metallic finishes can look plasticky rather than expensive, so if you are buying for an outdoor wedding in July, look closely at the fabric in natural light before you commit, not just under shop spotlights. For fit, go with your usual size but pay attention to the lining, because a lot of silver dresses have a separate slip underneath the metallic layer, and if that lining is tight while the outer layer is forgiving, you will feel it the moment you sit down for dinner. Check the stretch too, since some of these fabrics have none at all, and a dress that looked fine standing in the changing room can turn into a very different experience once you are reaching for a wine glass across a table.
This is a cold weather dress by instinct, a December and January piece, suited to evening parties, the kind of event with low lighting and photographs, rather than anything daytime or summery. It does carry a season after season after that, provided you treat it properly, hand wash or dry clean rather than a hot machine cycle, because metallic coatings crack and dull faster than people expect, and a dress that has been folded badly in a bag for a few months can pick up creases that never fully drop out. Pack it flat where you can, or roll it rather than fold it tightly, since sharp fold lines in metallic fabric tend to stay visible longer than in normal fabric.
Avoid pairing it with anything else that shines, gold jewellery especially, which fights the cool tone of silver rather than complementing it, and skip busy prints in a coat or bag, since the dress itself is already the statement and anything competing just looks cluttered.