Alwaysforme.com is a good website to got to for plus size active workout wear. If you are a woman there is a website called womanwithin.com or oldnavy.com has a plus size section.
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.
The best and the cheapes store to purchase plus size in the active wear would be Burlington Coat Factory. It is an outlet that has alot of plus clothes for a very reasonable price.
For plus size swim wear, visit http://www.swimsuitsforall.com/. This web site carries flattering swim wear for women sizes 8-16. They offer fresh designs that will compliment women with full figures and the site is updates on a weekly basis.
You can find formal plus size wear on the following website: http://www.elegantplus.com/Plus-Size-Clothing-Mall/plus-size-formalwear.htm. They have a great selection.
Extra large woman can find pretty much everything in 16 plus stores including bathing suits.The chain carries just plus sizes with todays fashion in mind.
There are many stores that has a good deal on plus size men wear. Burlington Coat factory is an outlet that has real good deals on plus size men wear. JcPenney also is another good store that has good deals on plus size men wear.
Women's Plus Size 3W (26-28) Depends on height and body type. I weigh 220 and wear a size 16-18 (plus size 1x) and I'm 5'5"
The biggest name in plus size clothing is Lane Bryant. The retail chain has been selling plus size clothing for several decades. The label IGIGI specializes in plus-sized evening wear, wedding gowns and business wear.
No costco do not carry plus size swim wear. Costco barely carry any clothing items, so i doubt they'll have plus size swim wear. Costco sells mostly foods and home furnishing.
Proper fitting swim wear can be hard to find for a plus size woman. It is important to find swim wear with more coverage to cover cleavage and thighs. These tend to be problem areas. A good plus size suit will hide these areas.
Size10
JC Penney carries several options in ladies plus size swimwear. There is the traditional one piece or you could opt for a 2 piece tankani, which covers the tummy and yet is a popular style. JC Penney also offers mix and match meaning you can by the top piece in one size and the bottoms in another.