4oz and larger bottles are sold for refilling, they are not intended for daily use.
For More information see the Bottle Size Usage Guide.
Which Yarrow should I choose?
Many essential oil companies carry more than one yarrow essential oil. A yarrow oil which has a pale green color like Yarrow Green or Yarrow Green USA seems to be slightly stronger in hormone balancing properties than a deeper blue one like Yarrow Blue. Yarrow Yellow is a particularly good febrifuge (reduces fever and produces a sweat). Deeper blue yarrow oils have an advantage as an astringent and in pulling the edges of wounds together. The blue one is the one sought after most frequently as a single oil.