The cost to hire a fashion designer starts from £10 for a waist and back seam, and ranges up to £80 for shortening a wedding dress hem. For new made-to-measure clothing from a fashion designer, you can expect to pay £15 an hour for ladies shirts, £20 an hour for men’s shirts, and £75 an hour for jackets. The total cost for a garment designed by a fashion designer will depend on how intricate the design is, and the designer you choose. Most designers will include design, measuring and fitting in their hourly cost.