can u alter a wedding dress from a size 9 to a 20
Yes, however, it will not look the same. A size 9 wedding dress does not have the "extra" fabric in it to make it bigger. You can alter it to be smaller or possibly 1 size bigger. But to make a size 9 dress into a size 20 dress, your tailor or seamstress will need to add more fabric. You would have to find the exact fabric/materials as the original dress. The best option would be to look around for a similar style in the size 20.