How do you scale a pattern?
Take your ruler and cut your pattern horizontally and vertically. Use the lines as a guide. For example, if you need to scale the pattern up one inch, you would cut the pattern and spread the pieces 1/2″ on each side. If you need to scale it down, you would overlap the pieces instead.
How do you scale up a book pattern?
Measure the pattern (in the book or reduced on paper) and multiply that measurement by as much as needed. For example, if the pattern says ‘enlarge by 200%’, then multiply the starting size by 2. If the pattern says ‘enlarge by 150%’, then multiply the starting size by 1.5.
Can you use the same sewing pattern for different sizes?
A multi-sized pattern is much easier to make minor sizing alterations. As you trace the pattern you can gently go from one size to another by following the lines for the various sizes.