Detachable starched day collar 100% cotton, made in England, marked 2010 - which is probably the date of manufacture. The style is called "Sloane".
This is a traditional, DEEP collar. Measurement straight down from top to the point is 2.75". Depth at the back is 2". Please check that this is the style you require.
You will need a pair of collar studs to fix this collar to your tunic shirt. These studs are available separately (the stud in the pictures is just for display).