Must by stylish - would your grandma wear it? Most importantly must be a design that appeals to grandmothers, grandfathers, or grandparents.
Must be a typography heavy design with optional stock image use where appropriate to provide more depth (see linked examples: the hands, cartoonish grandma face, cartoonish hammer, etc. It doesn't have to be these particular images, but this is just what's worked in the past, but open to new styles!).
We're open to anything if it fits the above criteria. The design on the white text on black shirts is what we are currently running well, the others are just what we've used in this similar style and are good sellers too .
Most of the designs are up to 3 colors only.
We see a lot of designs sell well to designs like these: https://goo.gl/qWosLn