If i maybe make a guild charter a really big one!

what size could it be in photoshop??

i tryed many sizes but too small.. maybe you can help?

You can try so many different sizes.
There are guild charters with all kinds of different sizes such as:
850 x 1850 Pixels.
800 x 1010 Pixels.
1152 x 1152 Pixels.

And so much more.

It's up to you or the person who buy the charter to decide which size the charter should be.

The more text you have to put on the charter, the bigger you charter would have to be

when i try 1152x1152 its small??

Yes, in Photoshop it looks small at first.
Photoshop makes it look smaller, while it is still the right size. (This makes it easier to work on).