To help with an accurate quote if you can supply these details.

1 details of cornice to be fitted. Size-projection and depth. Maybe even product code and link to the website its purchased from.

2 number of meters to be fitted the amount of rooms and mitres in each.

3 approximate ceiling height and state of decor. Such as just been plastered/decorated empty room or with furniture.

4 address and post code of the job. Any access issues that may arise.