alterations Expert Alterations Alterations Question Letting "OUT" Weddings, Planning Wedding Forums WeddingWire Is this too tight? I was pressured into buying a dress a couple sizes too small and was told most wedding dresses have seam allowance to let them out. I ended up This brides dress was too tight at the bust and there was not enough seam allowance to let out, so we added tulle side panels that we are hiding under lace appliqu.