white t-shirt

Petit Bateau :
they are French classics. Originally for kids but for the past 20 years, also in adult sizes : 14 ans, 16 ans, 18 ans; "ans" meaning years. It's the equivalent of sizes 2/4/6.

They are an incredible quality, made from a thick egyptian cotton. I still have some that I bought 8 or 9 years ago.

Colors are great too. And price is very resonnable.

I don't know where to find them in the USbut will try to find an online store.
I'll keep you posted.
 
I'd also recommend American Apparel (as always :P) and H&M mens section. I just bought a mens t-shirt that totally resembles the t-shirt that was created by Alexander Wang/Errin Wasson and I LOVE it!!
 
Petit Bateau are great, I've been wearing these ever since my mother bought them for me as a child. I now also love American Apparel specifically the 2102 tee
 
I like Banana Republic Ts for a little looser fit, and my J Crew Perfect Fit Tees for a snugger fit. I find that most t-shirts don't last more than a year or two because I wear them so often (sweat, stains, stretching out, etc.).