How our sizes work
The different sizes we use refer to the length across the face in mm as seen in this image. Please note that cornice sizes are approximate, and for actual measurements, please refer to a physical sample. The image below is a 140 mm cornice. If we refer to a 100 mm cornice, the size across the face is 100 mm.
On all our profiles, we have images showing you the size across the face like above, as well as the size along the wall and the ceiling.