For anyone who is still looking for a pair of comfy white skinny jeans, I'd recommend trying out Madewell. I just bought the Skinny Skinny Crop Zipper jeans, and they are very comfortable! They have a lot of stretch and so don't make you feel like you're in sausage casings. They're not a pure optical white but a bit off white in color. I'm very happy with my purchase! I think they run pretty true to size. I normally wear a 24 or sometimes a 25, but I got the 24 because they are so stretchy.

I also tried their Skinny Skinny jeans (the noncropped ones; they come in two lengths), and they seemed to have a calf that was a little on the larger size, if anyone is having a difficult time fitting their calves. If you have the opposite problem (like I do—skinny calves!), I also found a pair of skinny jeans at Loft (Super Skinny) that were very slim in the calf—and were also full length. The Loft jeans were a bright optical white, and I am very pleased with them too.