Hi I just translated using Bing> Instructions translated as follows ----"All dimensions are without seam (seam add 0,75 cm on each side.)"
This seems to be very clear! Good luck!
Here in Aus. all magazines and most craft books are published in metric. Some have imperial measurements in brackets, others provide more gist for the grey matter to work upon. I find it amazing how I slipped very comfortably back to yards and inches even though I taught using the metric system all my 30 year career as an early educator. Seems our 'first language" is always with us!