I've created some art in GIMP for a t-shirt printing. The printers want 300dpi (don't know how to convert to that from pixels!).
My print is currently 1186 × 849 pixels / 16.488 × 11.803 inches.
I would like to increase the size and also depixelate the edges of the image, which I've seen might be impossible without redrawing in a vector program.
However most of the graphic is a photo that has been de-saturated to bring out the blacks/whites, so the I guess the photo quality is the issue here? Here's the artwork:
If anyone has any tips on depixelating/increasing image size in this case, that'd be a great help :)