Apparel stocks dive as the Amazon juggernaut rolls on.

First, it was Amazon buying Whole Foods and threatening to disrupt the grocery business.

Never mind Whole Foods has less than 3 percent of that business, the mere fact that Amazon was involved has been enough to send grocery chains into a tailspin.

Tuesday brought Amazon Prime Wardrobe, where the online retailer tackles the biggest problems of buying clothes: 1) the time it takes to shop, 2) the hassle of finding the size that's right for you, and 3) returning stuff you don't want.

Judging by the market's reaction, it looks like the Street believes Amazon has advanced the ball considerably: Nordstrom closed down nearly 4 percent, JC Penney more than 5 percent, and Ascena Group and Chico's more than 4 percent. Even discounters like TJX and Ross Stores fell 3 percent and nearly 5 percent, respectively.

It's a simple idea: try before you buy, and only pay for what you keep. Pick out three items or more, and you get shipping for free (if you're a Prime member of course). You have seven days to try the stuff on and decide what you keep.