Basically, two styles are available the flat top version or Georgian door surround and the pitched top version or Victorian style bot types use the same side pillars.
There is some flexibility on the sizes during installation the pillars can be slid in a bit to fit the existing door opening detailed drawings are provided in the product details. The height is also adjustable you can trim the pillars with a fine tooth saw on a flat surface taking care at the end of the cut not to snap the side you wish to keep. If the standard pillar height is too low you can buy add on's to extend the pillar height.
The products are made to order and as such are non-returnable delivery is normally around 5 working days but may take longer in peak season.
Need further help please feel free to call us on 01179719922