Because each person is different in what they consider to be 'comfortable' or 'appropriate' we are not able give any advise or suggestions on what is the 'best fit' or the 'right size' for your collar.  We have been doing this a long time.  We quickly learned that there is no exact formula or 'standard' when it comes to sizing a day collar.  For this reason we have gone to great lengths to devise a 'method' by which the customer, if done as instructed, can get the best fit for them.  You can find the 'Sizing Tutorial' Videos at the top of any page here on our website.