There are tons of sites out there on the internet with christian clothing for sale. Most of those christian clothing sites online have basic screen printed designs sporting in your face slogans with the same three verses, all on a backdrops of various sized crosses, or something similar.
Don't get me wrong, there's nothing wrong with those designs, but for those out there wanting to get a cool unique t-shirt that is both artistic and shows your faith these sites might not be the best option for you.
C28.com is the best place for finding cool christian tees online. C28 is a company that has some how been extremely successful in bringing "cool" to christians. They have many retail stores in malls, mostly in California. But their online store is where it's at, with a variety for guys and girls. They have t-shirts, lots of t-shirts. From hardcore to hipster, they have t-shirts for every style. They also carry pants, jackets, and a variety of accessories. Music and dvds are also served up on the site.
The site has wares from the top christian clothing brands including Not Of This World, Truth Soul Armor, and R23, among others. However some of the best T-shirts on the site aren't created by brands, but rather users of the site.
Another option for finding christian clothing online is Etsy. Etsy is an online store where people can sell their own high quality crafts. The are some sellers on Etsy who also have christian clothing designs. An awesome example of christian clothing on Etsy is BarcodeArt's Barcode Jesus T-shirt.
While there aren't a ton of places to find fashionable christian clothing online the options that do exist are fantastic. So if you want to wear your faith on your sleeve check them out before you hit the local mall and settle for something else.