Your best option would be to check out a couple different websites. Look at the models, making sure the model forms are as close to your girlfriends size/form. Also, look for colors that she would enjoy; if she doesn't like orange, don't purchase anything in the orange family.
You can find plus size bikinis at Fashion Bug, Burlington Coat Factory, JcPenney and even Sears. There are other places that you can visit as well to find some bathing suits with plus size bikinis.
It is always difficult to find that right fitting bathing suit no matter what size or shape you are. If you are looking for plus size bathing suits in the UK, try this website. http://www.ukswimstore.com/c-5-plus-size-swimwear.aspx
I have seen really cute Plus Size Bathing Wear at stores like JC Penneys and Macys - also at Target. You should also be able to find cute Plus Size Bathing Wear at various online retailers.
You can find beautiful plus size dresses on the following website: http://www.igigi.com/. They have a great selection.
I am sorry but I did not find any websites that accurately provides information relating to contests for plus size models specifically for bathing suits.
There are many stores that sell plus size bathing suits. Some websites that sell a wide variety of bathing suits include Addition Elle, Swim Outlet, JC Penney and Lane Bryant.
Ross has special deals everyday. Ross has what your looking for in plus sizes with half the price you can find in retails stores for the same piece of cloth.
swimsuitsforall.com has a section that shows you discount and clearance bathing suits for stores, and also as the name suggests, has bathing suits for every size and should have a big selection for plus size.
To find beautiful dresses, look on www.igigi.com, davidsbridal.com, and elegantplus.com. All of these websites have gorgeous dresses for plus size women.
There are plus size bating suits for teenage girls but there aren't any that are universal.
Style and comfort are important when selecting the perfect plus size bathing suit. Choose from a variety of styles, from tankinis to one piece suits and boy shorts with matching tops. Don't be afraid to be daring and bold in your plus size bathing suit. Select suits in bold oranges, reds and neon colors. Your swimming suit is more than just something to wear into the water. It's an opportunity to show of your curves and your confidence. Plus size bathing suits are made specifically to cover problem areas and are cut to maximize your curves. No matter what your body shape, there is a plus size bathing suit that is perfect for you.
Ross is the store you have been looking for. Ross always has special deals and has a big section for plus size swimwear. You can always find good deals at Ross for half the price of a retail store.