This can make it really hard when you start expressing breast milk - to know how much milk baby will need for a feed, and how much milk to feed baby (and you don't want to waste any milk after you have gone to all that effort pumping it!!)
Based on a information specified on a baby formula tin, this is the volume of milk and number of feeds per day that they recommend. This will be the same for breastmilk, so I think it is fair to use this guide so you know how much expressed breast milk to give your baby.
1 week: 50mL feed for 6-7 times per day.
up to 2 weeks old: 100mL feed for 5-6 times per day.
up to 1 month old: 100mL feed for 6 times per day.
up to 2 months old: 150mL feed for 5 times per day.
up to 4 months old: 200mL feed for 5 times per day.
up to 6 months old: 200mL feed for 4-5 times per day
over 6 months: 200mL feed for 3-4 times per day.
This is a guide. your baby may need more or less than this.
I would also like to suggest that you view our website, we have other articles online which give you guidance on expressing, and storing breast milk. Go here: http://www.breastmates.co.nz/Articles_Breastfeeding_Nursing.html