I use the clothing charts at e-commerce sites, like JC Penny. Sometimes it's trial and error. The bra charts are fairly easy to use for band size. Cup size seems to be mathematically easy to compute, but, the cut of the bra sometimes doesn't seem to work well. I try to wear a full coverage bra. Once I find one that fits well, I'll order that style in various colors. Mail order seems to work best, if you're reluctant to buy in person, although at Christmas time it seems nobody seems to notice in store purchases. When slips were popular and came in pretty colors with matching bras and panties, I loved buying an outfit for "my wife." I find the sizing charts offered by retailers that are unique to a particular brand are fairly accurate. Many eBay sellers are aware many of their sales are to CD's, so they seem to state whether the fabric of a dress has stretch to it. There are some decent bargains to be had on eBay, but, sometimes I've bought something that gets immediately donated to Goodwill. Just do not spend a lot of money on something without trying it on. It's easy to donate a $20 dress than $100 dress.
