If you’re upgrading your iPhone X, you might need a new case

FYI

iPhone XS camera bump is slightly taller, iPhone X cases may not fit perfectly | 9to5Mac
— Read on 9to5mac.com/2018/09/19/iphone-xs-some-x-cases-might-not-fit/

you might want to wait and see how it fits before you order a new one, but if you need an excuse to buy a new case, here ya go.