If you’re unsure what type of iPad you have, look on the back of the tablet, at the writing etched in to the case.
In the second row of text, you see the words “Model A1432”. Go to this Apple web page and search for your model number on that page. “A1432” is an iPad Mini. Don’t worry about the distinction of WiFi vs. WiFi+Cellular. Those features don’t affect the size or layout of the keyguard.
If you don’t have easy access to the model number but you can easily get your hands on the tablet serial number, order number, or EMC number, just type that number into the form on this website and it will tell you the type of iPad you’re using.