Abstract: A method for assembling an upholstery for a seat or for stuffed furniture including the steps of: providing a first upholstery element and a second upholstery element to be sewn together, wherein the first upholstery element and the second element have a visible upper surface and a non-visible lower surface; placing a first edge of the first element alongside a first edge of the second element until they are in abutting contact, that is head against head, in a coplanar way; sewing the first edge of the first element to the first edge of the second element with a stitch chosen from classes 300, 400 or 600.