One of the fastest-growing lingerie e-commerce sites out there is Adore Me. In July, the membership-based site closed its Series B venture capital round at $8.5 million. It also hired on a former Victoria’s Secret design director as its head of design. In addition to being affordable, another big way in which Adore Me goes head to head with VS is inventory and variety of merchandise: It launches an entire new collection every month. Not sure about fit? Shipping, returns and exchanges are all free.