A tailoring dummy is very useful for tailoring. One that exactly fits your measurements is even more useful. Since you can find everything on the internet, it's not hard to find instructions for making a tailoring dummy from old t-shirts and duct tape. You can order instructions from Leanna but she's also got a few anecdotes online. At Threads Magazine is an overview of the various kinds of home-made dummy. We've also discussed this in the Hobbyschneiderin forums (German). Here are my tips and advice.
Once the victim has benn wrapped twice, you can mark the waist. Make sure to measure how far it is from the floor to make the dummy the right height later on! Then cut up the tape and the t-shirt carefully, trying not to cut the bra too.
Now the patient person may go have a coffee while the victim can finally do something herself!
Tape the coat hanger to the broom stick or cardboard tube. Use this to strengthen the shoulders in the dummy. Tape the dummy back closed and stuff, taking care to keep the “stem” always in the middle and to keep to the contours of the dummy. Tape a piece of cardboard at the lower opening. Admire the dummy, and check the measurements.
You can reduce width by wrapping tightly with tape, and add width by stuffing more. If the bust was pressed too much, an old bra stuffed with tights helps (on the dummy, stupid!). In order to cover the ugly tape, you can clothe the dummy in 2 old tight t-shirts.
And if you put it in a parasol stand, it's very stable and you can turn it around! If the broomstick is too thin, you can wrap it with newspaper or tape… mmmh, tape ;)