i can’t find any setting for changing the default terrain’s size?:x
Since this is the 1st result on google for me and I was looking for the same answer I’ll take a moment to give the answer now that I know it. Scale obviously has no impact on the size of a terrain. It’s located in the inspector → terrain → terrain settings (a very small icon of a mountain with a gear) Look for a “mesh resolution” drop down. This is where you can set the width and height.