I have had experience with lots of European brands and feel comfortable with presenting our translation.
36=3 & half
41=7 & half
The European scale is actually at a slightly different frequency from the UK scale creating the rather odd half zones at 36 and 41.
I have found that different brands and countries will have slightly different interpretations with Southern European Brands such as Spain and Italy tending to be a little smaller that Northern European such as Germany and Denmark- this is by no means absolute so please do some research on that brand to ensure a good "remote buying" fit.
I hope this guide has been of use.