High-Resolution DTF T-Shirt Design Creation

I need a tshirt design that is at least 12" wide that can be submitted for DTF printing and placed on a tshirt; it needs to be high enough resolution so that it is capable of being printed; it needs to... (Budget: $10 - $30 USD, Jobs: Adobe Illustrator, Adobe Photoshop, AI Art Creation, Digital Art, Graphic Design, Photoshop, Photoshop Design, Print Design, T-Shirts, Vector Design)