what size cover do i need for. ipad 0s15.5

A lot of iPad models support iPadOS 15.5. What exact model iPad do you own and what type of cover are you looking for?

Go to Settings > General > About > Model

Ps: You have posted a photo which includes your phone number and device serial number in a public forum, which is most unwise. I have asked the forum hosts to remove the photo for your protection.

Then do as requested and go to Settings > General > About > Model and report back. You photo has been removed and should not have been posted.

That's nice! Now, if you'll post the actual model number, I can help you find an appropriate case for your iPad 😉