How do I change my emoji keyboard back to the smaller size?

There is no method to change it back, but you can send feedback here:

Product Feedback - Apple

Previously users complained that the emojis were too small, so apparently Apple listened to their feedback and made them bigger. You can do the same if you do not like the bigger size to let Apple know how you feel.

newton251 wrote:

Is there any update? It’s been almost a month. Apple needs to listen to us. I never heard anyone ever ask for bigger emojis, who would need that? Give us the option to make it smaller again!!

Apple only reads what has been sent to them with the provided Feedback link, they will not see your post here. Also keep in mind that Apple already has released iOS 18.3 beta and it is being tested and you can bet they are even working farther out than that with 18.4. The release date of those has not been announced.

Follow the advice that has been given and be patient to see how these betas play out. Whining here about it does no good.

Is there any update? It’s been almost a month. Apple needs to listen to us. I never heard anyone ever ask for bigger emojis, who would need that? Give us the option to make it smaller again!!