To wear this bridesmaid dress, simply put it on over your head and adjust the tie straps to your comfort. You can attach or remove the sash according to your style preference. When it comes to sizing, if you choose the standard size, just pick based on our size chart. For custom sizing, make sure to measure yourself accurately. As for maintenance, since it's made of chiffon, it's best to hand - wash it in cold water with a gentle detergent. Lay it flat to dry to avoid any stretching. Don't bleach it, and if you need to iron, use a low - heat setting.