A couple of days ago I was doing some cleaning on some Azure SQL DBs and shrinking some files to lower the bill. To check my progress I needed to check the size before/after the task in an easy way for multiple Azure SQL DBs. Check Azure SQL DB storage space for 1 database If you need to check the storage space being used by a single Azure SQL DB, that is as easy as jumping on the portal, selecting the desired database, and you can find the information in the Overview. This is shown below.
Using T-SQL