Yes you can, as long as it counts as a Permitted Use under our Content License Agreement (see section 5). The design should also be your own creation. It's never OK to sell Canva Content on a standalone basis, like putting one of our template designs on a T-shirt and selling it as-is, for example.
You can legally sell your original design on printed merchandise like T-shirts, posters, stickers, tote bags, and the like. You can also design and sell certain digital products like e-books and magazines, or create designs for your clients (e.g., a social media post) and transfer the rights to them (see section 4A of our License).
For commercial and other legal uses of designs, images, videos, and more created with AI products within Canva, make sure to follow our terms.