New Base for iPad
As long as you have a compatible iPad, the new Osmo iPad Base will fit your iPad.
However, if you have a thin bezel device, you may require a new reflector before your device will work with the Osmo games.
Please see this compatibility guide for up-to-date information on which iPads are compatible with Osmo and to see which require an updated reflector.
Classic Base for iPad
The classic iPad base is not compatible with all iPads.
For more information on the different Osmo bases available, please see this article.