At his age, he would be a really big guy at 800g. Commonly, they are near ten years old before you start seeing them that big. Possible, but not as common.
Let's wait until he is a bit more settled and go for a scaled weight!
As you know, the best weight is taken at the same time each time and the most consistent weight is taken after the first moment of the day and before the first meal of the day.
Yep, need to do that to say anything for sure
But my friends cockatoo sit next to him today (they get along just fine too, my Mealy seems to like every bird he sees) and i can say that he is few centimeters taller than that 730gram umbrella cockatoo (crest down of course)
A 'few' centimeters taller? Really. Hmmm, Big Boy for sure!
Mealy's are well known to be the Gentle Giants of the Amazona Family! However, that does not mean that if pushed, they will inflict extensive damage to other Parrots and Humans alike. Like any of the larger Parrots, always pay close attention around 'stupid' Humans and 'pushy' Parrots.
Sure thing, i wouldn't never left my birds unattended with any other birds. I wont let them be even together unattended.
And yep, he is few centimeters taller than my friend umbrella2 _BUT_ was my mealy streching out a bit or was his u2 crouching a bit... cant say.
Only thing i know is that his u2 is 45cm from tail to beak

... And my mealy isn't atleast "shorter" than him when they are sitting together in perch.
Heh, i haven't googled these before but i'm only now starting to understand that he really is a one big boned zon =)
E: He was playing on our living room table, crouching and picking seeds so i grabbed tape measure and roughly measured him... I'm pretty sure he is quite accurately 44cm from peak to tail... So maybe the u2 was crouching then

... Or u2 has shorter legs =)
E2: He is really driving me to healthy diet too... He goes mad when he sees french fries, so i cant have french fries anymore... Just now i figured out it's the same thing with potato chips, he just jumped to my arm and tried to take them from my mouth. Then i dipped one in water glass (to take salt of), gived it to him and thought that would be enough for him but no, then he goed straight to the potato chip bag, and stole one more... ...potato chips are now in kitchen closet, damn i cant have anything good because it's not good for my parrot

... I might need to get the bag from the closet and make a video what he does when he sees it.
When i try to eat french fries:
[ame="https://www.youtube.com/watch?v=xugWzc37DpU"]Mealy and french fries - YouTube[/ame]
When i try to eat pizza:
[ame="https://www.youtube.com/watch?v=YJc7dUpxCKw"]Mealy and Pizza - YouTube[/ame]