I am accustomed to American sizing and English measurements. Aldrich is from Great Britain and her book is very British. British fashion terms and metric measurements. I have to read things very closely and study the charts carefully to understand the things she is talking about. Despite that, the book is excellent. I can sit at the feet of a master pattern cutter and learn from her years of experience and wisdom.
I have yet to decide on making my blocks using the metric system or not. I may use her drafting methods and substitute my own measurements. I have one measurement chart based off the US measurement study done in 1975 and I keep going back to it. Plus, I like the way she has broken down infant/toddler sizing to reduce redundant sizing. I will blog more about this topic next week.
I am most impressed with her initiative to do her own measurement study. And surprisingly, her measurements are not dissimilar from a British government study released in 1988-1989. The British (and really the EU) have adopted in their sizing is to designate children's sizes based on height with age being a reference. There are many advantages to such a system. Again, more about that next week.