Step 3: MEASURE AND CUT THE INNER TUBE
The space craft.
Measure your waist, neck, and bodice. Add about 10 inches, I know it sounds like a lot but you don't want to cut the pieces too short. It is easier to work with if your piece is smaller but not exactly the size you want it to finish at.
Try the pieces on and tape them or hold them into place and make sure they overlap about 4 inches. Then decide how much more you want to cut off.
The space craft needs to be larger because it is cut on a circle and it is the largest piece.
You need to cut it short enough to look like a space craft in the leg area.
I cut my neck piece too short because I measured it to fit.
Now using the belt try on the skirt part of the costume and see of it overlaps about 4 inches.
If it is too long trim it.
Measure the neck and the bodice the same way.