It doesn't have to be a specific size, you can try .jpg files as they're much smaller than .png files. If you have any kind of photo editing software try cropping the part of the image you want and saving it as a .jpg
I don't know how to search for picture size, sorry.
Kk thx and if u ever want to join my world and either see it ur self or help build just tell me...btw pl, keep this thread open cuz I'll post updates if this is open..if not I'll just start one on my page
First of all I would like to say thank you for helping me. For the copy my world question. You seem to know a lot about minecraft. I think in the future it I have any question I will come to you. So again thank you. 😊