I found a set of free patterns for clothes here . They are in Japanese but there are pictures so you can pretty much guess what to do if you have a bit of sewing experience. For the wedding dress, I used the gathered dress pattern which is second from the bottom. Click on that picture. You'll see 3 lines of text underneath it which probably appear in Japanese script on an enabled computer but look like a bunch of symbols on mine. Click on the first one and you'll get the pattern. The second one has the instructions and pictures. If you are just making a plain dress, follow the pictures and you'll see what to do.
To make the wedding dress, I used an old baby t-shirt but you could use any white t-shirt. The benefit of using an old t-shirt is that you don't have to do any hemming because it's t-shirt fabric which doesn't fray and you can also use the bottom of the shirt or even the sleeve to make the bottom hem. This is a really good thing to do because it makes the skirt stick out a bit. Cut out the 2 pieces. The skirt should be about 4cm wide by 19cm long (I've made it a bit wider than the pattern so it's a full-length dress). Stitch 2 rows of 1cm wide lace along the length of the skirt and then stitch one row of lace around the neck. Stitch the two underarm sections on the top as shown in the Japanese pattern picture. Gather the top of the skirt and pin it to the bodice section and then stitch it in place. Try it on your Sylvanian to make sure it fits (there should be some lap over on the back. Fold one side of the back over by a tiny amount (just enough to get it under your needle. Attach 2 long skinny bits of velcro to the back and you have your wedding dress.
To make the veil, take a piece of the same lace you used on the dress and wrap it around your Sylvanian's head to get the right size. Add about 0.5cm on the length of the lace to lap over at the back (you'll add velcro in a moment). Now take a wider piece of lace or about 8x8cm of net/tulle and fold it over concertina style at one end. Stitch the folded end to the skinnier lace at one end so that it will be at the back of the Sylvanian's head when it's attached. Now attatch velcro to either end of your skinny lace with the veil attachment and you are good to go with your bridal headdress.
For the bouquet, I totally cheated and I really don't recommend you do what I did if it's going to be played with by children. What I recommend you do is to hand stitch 3 ribbon roses onto a small piece of elastic so that it can be looped over the toy's hand. What I did was to pin 3 ribbon roses onto a safety pin and loop that over the toy's hand. That's because I'm lazy and because I needed to get off the sewing machine and go and make the kid's some lunch! The safer version will be made later when I have less hungry children and more time.
I've got to figure out how to make something for the groom to wear now. Hm, I wonder if the Mr would notice if I used one of his black t-shirts to make a jacket....
