Have you found the perfect white top?

[frumperina]

If so could you kindly share your sources?
For me perfect includes long sleeves, V neck( due to giant boobage), not too thin(not see through) and long, preferably bum covering.

Ah... had a good suggestion until I saw the "long" bit. I think Uniqlo basic t-shirts are fab. The fabric washes well, keeps its shape and is opaque, and the sleeves are actually the right length for my orangutan-length arms.

Dorothy Perkins are quite good for things like that.