Is 300 Cc Equivalent in Size to a Small Grapefruit?

     That would be a very small grapefruit.  It can be helpful to think of volume by taking a pan of certain dimensions or surface area (cm x cm) and then filling the pan with fluid to obtain a height in cm to result in a volume of cubic cm, or cc, or ml.  Kenneth Hughes, MD Los Angeles, CA 

Hello and thanks for you post. I see you're trying to visualize a certain amount of volume. Grapefruits vary in size, but we all know that a 12 oz soda can is 355 cc of volume. Therefore, 300 cc is just a little smaller than a soda pop can. I hope this helps....

If your not sure of what 300 cc volume is, you can do a baggy test with the volume you want and you can get an idea of what it looks like.