Review on Optimized Roller Bottle Set: Includes Funnels and Droppers by Elizabeth Woods

They are exactly as described. And YES, they are 5ml. I was a bit skeptical when I got mine too, but I measured the liquid in the bottle and they hold just over 5ml if you fill to the brim. Don't let the size fool you, the reason they look smaller than others is because they aren't made of thick, heavy glass. The glass is good, not flimsy. Just the perfect size to wear!