Snapback, Trucker or Dad Cap: Matching the Patch to the Hat
https://shed-wiki.win/index.php/Why_Some_Patches_Curl_and_How_to_Prevent_It
A patch that looks perfect on a mockup can look wrong on the actual hat. Too big, and it buckles over the curve of the crown. Too stiff, and it pulls away from a soft, unstructured front. Too flat, and it disappears against a busy mesh back