How To Upscale Midjourney Images For Printing - SIMPLE Method

Great video, however most places require 300dpi. I noticed yours was 96. Does this matter?

I love MIdjourney, been using it for my POD. I have been making pillows and table runners and the DPI is great (I do 8x on big.jpg). However, can't seem to figure out how to enlarge an image enough to go on a blanket (60x80 inch). If I use 16x on big,jpg, the PNG is then too large for Printify, and 8X isn't enough DPI (my image says high resolution 117, but apparently 150 DPI is what they are suggesting on Printify). Any suggestions on taking an image from MJ and making it large enough for this blanket application? Thanks

Thank you so much for this! Quick, concise, to the point, and very helpful.