Finding the right lingerie can be difficult. It's a matter of style, size, and comfort. I have always been a little hesitant when it comes to purchasing clothing online, but especially lingerie. It seems so hard to be sure you're ordering the right size, since many brands are sized just a little bit different. I imagine that finding plus size lingerie is even harder, and therefore can be more troublesome.
Woman Within is an online store that I have purchased through in the past (found some adorable tops that were very reasonably priced), and I was very pleased with the ease of ordering, sizing on the clothes, and fast shipping. So if you're in the market for lingerie for women from size 12 to 44, I recommend you check out their site. (They also have a great clearance section).
The Woman Within lingerie department also includes shapewear, tights, camisoles, and slips. I really love this culotte underliner; it's great for staying modest while participating in active sports!
You can also find cute thermal wear that is just perfect for the cold weather coming. Great for lounging around the house in the evening :)