As long as you have an iPad other than the Pro 12.9-inch, the Osmo iPad Base will fit your iPad.
It's possible that you need to switch the Base inserts to accommodate yours. If this is the case, please follow the simple instructions in this video. Suggest getting a pencil with eraser ready to do this:
If, for any reason, you still have a question about adjusting the inserts, please reach out to email@example.com for assistance.