JJ's House and Alie Express both sell plus size bridal gloves. Another good site to check out is Top Wedding.
You shouldn't have any trouble finding them at David's Bridal or GlovePassion.com. If you can't find them at your bridal shop, try a plus size fashion accessory site.
For plus sized wedding dresses in New York, you can try Kleinfeld or even Lane Bryant. You can also try The Bridal Building or Bridal Suite of Manhattan.
David's Bridal
You can purchase plus sized formal gowns at many bridal stores like David's Bridal or Bridesmart, which are located in Houston. If you are looking for a used gown, try ebay.com or craigslist.com.
You can buy plus size wedding gowns from a variety of places including David's Bridal.
Through my research, I've found that David's Bridal offers the largest selection of plus sized wedding dresses. Their website alone offers over twelve pages of plus sized wedding dresses in all different styles. David's Bridal is also a store that can be found in many different locations and their prices are very reasonable. Here is a direct link to David's Bridal's plus sized section: http://www.davidsbridal.com/Browse_Bridal-Gowns-Shop-By-Size-Plus-Sizes
Yes, David's Bridal sells plus size formal gowns. According to their website, they offer sizes from 16W to 24W. Sadly though, the prices are very very high.
Plus size formal gowns usually range in size from size 14 to 26 or higher. David's Bridal carries a large selection of plus sizes in formal gowns.
You can try going to David's Bridal if there are any in your area. Or you can find cute plus sized prom dresses in regular department stores such as JCPenny
The best way to accesorize depends on the designer. Many stores offer formal gloves and the can be manipulated or cut in many ways. There are many options such as adding beads for accesorizing gloves for a plus size woman.
If you go to some of the local wedding dress shops, such as David's Bridal, you can find plus size formal gowns. You can also try the plus size section of Nordstrom or, for a more budget-friendly option, J.C. Penney.
One can purchase child size white cotton gloves at a store called Walgreens. You can also find these gloves at websites such as Amazon and Gloves-Online.