Cityscape Rings are 1cm tall, they sit tighter than narrow rings. I recommend you to go up with a half size from your regular size.
The best way to know your ring size - to try one: Send Me Sizers Set.
To be 100% sure in your size, order ring sizers set. They let you be sure you will get the perfect fit metal ring. It is important when you are going to purchase golden or platinum ring since I don't accept exchanges on these metals.
For your convenience, below you will find information, which can help you to convert your size to the US size.
International Ring Size Conversion Chart