The size of a scutch comb refers to the length of its cutting edge. The different sized scutch combs are available in the same length as the scutch comb holder on a scutching tool.
For example, a 25mm (1″) scutch comb is made to fit the 25mm (1″) scutch comb holder on a scutch chisel or scutch hammer.
The sizes available range from 13-50mm (½ – 2″).
The most common size of scutch comb is a 25mm (1in) as it can fit both a scutch chisel and scutch hammer. This is because scutch hammers can only fit a 25mm (1in) scutch comb.