Structured Bra and Defined Waist
Double Sided Tape
This option is the most recommend best way to keep a strapless dress from falling down. The trick to using double sided tape is to find a product that was specifically designed to be used on skin, like wig tape or fashion tape. Just make sure the tape you do use won't damage the dress, because some tapes aren't suitable for all types of fabrics. Before applying the tape, make sure you clean the skin where the tape will go with rubbing alcohol since the tape will not stay stuck if you have oily skin or if you have lotion on.Have a Waist Stay Sewn In
While many strapless wedding dresses will feature boning in the dress, having a waist stay included can be the extra precaution you need to ensure you dress won't slip or fall. A waist stay is a simple grosgrain band that is fitted around the waist of the dress and uses two hooks to fasten together. This can help keep your wedding dress and strapless evening dress in the same position all day and night long.Pin it Up
Use safety pins to keep your dress in place by pinning it to your bra. This is a great backup plan to have on hand just in case if your other method seems to be failing. Make sure you pin from the inside of your dress to the bra. Ask your maid of honor to help you accomplish it, so you can be sure none of the ends of the pins end up pointing out from the top of your dress. Choose from: beaded blue long evening dresses , A-line prom dresses with lace appliquesA Silicone Rubber Strap
For some extra resistance, you might want to consider opting for a dress that has a silicone rubber gripper. This thin strip usually lines the inside top seam of the dress and will be more effective at providing some resistance against your skin and preventing the dress from falling down. Look for the best way to keep a strapless dress from falling? This should be one great choice.Consider Opening the Cups
If you have a bust size that is a D or larger, and you want to have plenty of room and coverage, then opening up the cups can provide you with just that. When you open the cup, you get more room in the bust line, which will prevent any unwanted dress slippage or worse, looking not so elegant or chic in your dress.Add Some Straps
If you are still nervous about your dress slipping constantly throughout your big day, consider adding straps. This can be done fairly quickly and you can go with something simple like a thin fabric strap or add in some more elegance and glam with a jeweled strap or lace capped sleeves.This way, you can choose strapless dresses as you like.