Big size, lasts a long time. This serum really does hydrate my skin. It can be a bit oily, so I only use it at night personally. My skin is combination to start with, though. It has helped clear up some acne I had too.
This is a super light hydrating serum. I'm really impressed with the formula. My skin is super soft and glowing. I will have to buy the full size one eventually as I seem to be running out rather quickly.
This is my favourite serum ever. One of the things I love about it is how quickly it absorbs. Other serums I've tried (eg Estee Lauder Perfectionist) sit on top of my skin and I can feel them on the surface of it, changing my skin's texture, because they have too much silicone. Quench is like a light facial oil that absorbs beautifully so its easy to layer other skincare and makeup products on top - no peeling, balling etc. I'm on my second bottle with no plans to change.