16 ounces or a gallon!   My Favorite line of shampoo and perfect for white coats.  Mix the Rainforest shampoo with whitening bright white conditioner too!  I use this on white pets including my doodles.  I talk about it on our Youtube channel!  16 oz is a great starter, but it goes fast.  If you have a large dog, it's best to order a gallon.  The combo shampoo and conditioner will help retain the smell longer.  All Sales Final.