fabi

Hello, I've read the forum and watched tutorial on how to resize the image. However, no matter what I do, images are around few hundred kb. as the result if I want to use this design on a Tshirt then it is like a dot. I think the image should be at least over 7-8 mb to be able to use it for any design purpose. How could I make the filer bigger in density. Thank you. Regards, Fabi