What is the smallest and largest subnet in Azure?
The smallest subnet in Azure is /29. So theoretically you have 8 IPs in subnet but Azure reserve 5 IPs so you will only get 3 IPs for yourself.
While the largest subnet in Azure is /8 . 5 IPs are reserved in this also.
Refer this post to know how to calculate the total number of IPs available in a subnet.
You can get more details on this page of Azure site .