This black off - shoulder mermaid bridesmaid dress is perfect for your big day. To put it on, start by slipping your arms through the off - shoulder part and then gently pull it down over your body. Make sure it sits well on your shoulders. When it comes to sizing, if you choose a standard size, you're good to go. But if you opt for custom sizing, measure yourself carefully and double - check the numbers before sending them to us. For maintenance, it's best to dry clean this chiffon dress to keep its shape and color. Avoid machine washing as it may damage the fabric. If the dress gets dirty, spot - clean it gently with a mild detergent. Store it in a cool, dry place, hanging it up to prevent wrinkles. And remember, if you're not satisfied, refer to our return policy for a hassle - free return.