The washable Dorlando collar is so named as it is a copy of an original which was made around 1910. This was the age of "peak collar" when they reached their height.
This particular one is an admirably high 3" or 7.5cm at the front
Washable collars can be put in the machine as normal on a 40 degree wash.
Iron on a cotton setting without steam or starch.
It is important not to use fabric conditioner.
When ordering collars it is usual to add 1/2" to the neckband collar size so a 15" shirt would need a 15 1/2" collar.
Sanforised white cotton.
Collar Stud Not Included.