Print the guide in A4 size and make sure the page size is set to “Actual Size” in the printing options.
To check if printout is correct, measure the line below. If the line is not exactly 5 cm long, reprint the document making sure you have not selected “Fit to Page” in the printing options.
To check the size of Luca Barra watches, print the page on an A4 sheet and superimpose one of your watches on the illustration until you find the most similar. Alternatively, cut out the watch and bring it to your wrist to find the model that suits you best.