To make this placemat put jeans strips one to another across a fabric substrate piece. Try to spread out jeans strips so that between them the substrate didn't appear through. Then sew jeans strips to a substrate, having made lines on the machine at the edges of all four parties of future product.
Then start weaving — it is very easy and quickly enough.
Upon termination of weaving cut uneven edges of strips and sew a product at the edges a fabric strip, having added a completeness rug.
And here is one more option of performance of a placemat.