I went from using the basic white a-shirts from Hanes and was fine with them for a while until it was time to replace. I knew these were assorted and seeing them at the store first hand, I realized they just come paired any random way so I was fine with whatever colors I received, just bored of white. Years of wear aside, these tanks right off the bat felt slightly thicker than the Hanes I had, maybe it's just because these are the colored variety and white is thinner? But whatever the case I like them more. They do feel freshly dyed/stiff/starchy out of the pack but I washed them before wear and they felt just fine.
I ordered the Medium even though I'm a 42-44chest(Large) because I wanted to make sure they fit snug and under shirts, to minimize any silhouetting and it had been a while since I last bought, so I wasn't sure if fit standards changed. The medium did fit me tight, it's about 10.5" across the chest just draped on a hanger, and you know they offer a lot of stretch to them, so I'd follow the "sizing info" offered. As far as the length(on hanger)it's ~26" from the top of the shoulder to the bottom. To be exact and clear, these measurements were taken off of a maroon(dark red) color. As with the regular gray/black FOTL pack here:
http://www.amazon.com/gp/product/B001EH9OWI/ref=oh_details_o02_s01_i00?ie=UTF8&psc=1
The widths are generally the same, HOWEVER the lengths vary by as much as 2". The maroon was the shortest for me @26" and a navy blue was the longest @28".
I'm happy with this product and would buy again, BUT in my size(Large) not the medium I chose.