This is the slightly newer Parkhurst last which has a slightly lower volume to provide a more comfortably snug fit and to help prevent heel slip while maintaining a rounded forefoot. Its features include a rounder, more laterally voluminous, yet low profile toebox along with a tapered arch and a snug heel. The instep on this last is more contoured to the natural shape of your instep angle. The taper in the arch and heel will provide a more natural, mild arch support.
Size comparison examples from current customers going off of a D/standard width:
Brannock - Half size down. If you're a 10D Brannock or slightly over a D width, go with size 9.5 in the 602 last. If you measure a single E width, more towards a single E width or prefer a slight bit of extra room without a drastic length increase, we suggest going with your Brannock size. In this example, a size 10.
Parkhurst No. 18 - True to size.
Alden Barrie and Trubalance - True to size if D width. Some customers go a half size up from this last into the 602 last if they are looking for a bit more space or have a wider forefoot.
Red Wing No. 8 - True to size if D width.
Thursday Boot - True to size if D width.
Allen Edmond's - True to size if D width.
Nike - Half size down if D width.
Adidas - Half size down if D width.
New Balance - Half size down if D width.
Sizing can be particular for each individual and we are more than happy to help you determine the correct size in our boots by emailing firstname.lastname@example.org. We can also assist in identifying the right size for you based off of what you wear in other brands of footwear.