Amanita Muscaria is a bit more dense weight wise than psilocybe mushrooms from my experience so a tiny bit of muscaria weighs more than a tiny bit of cubensis for example...
By the time I have dry my annual mountain harvest I usually have between one and two ounces.
That lasts me all year and I usually have leftovers.
It should be noted that the potency of Amanita varies greatly. I will also mention that I have tried internet Amanita a few times and the results from that were less than fabulous compared to results I have had with handpicked sun dried ones.
Here are some other posts I made about Amanita.
first amanita/DMT experincerecent amanita DMT experienceAmanita Changa And why do you look at the speck in your brother's eye, but do not percieve the plank in your own eye? Or how can you say to your brother, "brother let me remove the speck from your eye", when you yourself do not see the plank that is in your own eye?-Yeshua ben Yoseph