1. Browse different websites. Think about your wedding's theme, what the bridesmaids will be wearing, the ceremony location, and of course your own personal style. Contact a seamstress to take your measurements. Wear the same undergarments for this measuring session as you will on your wedding day.
2. Stick to a budget. Websites and auction sites feature tempting gowns of every conceivable style and price range, so it may be a bit overwhelming at first. Have a seamstress ready for alterations, just in case. Even if the gown looks perfect in the sales picture and in the box, it may need adjustments after you buy it and try it on.
3. Ask the seller questions before you buy online. Check the description and auction information for gown age, condition and measurements. Make sure that the seller will be available to answer questions or provide solutions for problems encountered after you receive the gown.
4. Calculate the time needed for the gown to arrive before the wedding when you buy it online. Leave a few days open for last minute fittings and alterations. You want to look perfect on your wedding day.