how to change the 3d images in unity when ui button is pressed?

I am designing a clothes system that character can change clothes.so when i click the button it have to change into different clothes images.How its done?

@amalajay1811 there are many ways to do this, assuming that your character already posses some function that allow him to change clothes the simplest would be to create an enum and use the enum values as IDs (or simply use integers, strings etc… though i advice you to use enum for many reasons including the way they show in the unity editor) when the button is clicked call that function giving it the ID and from there select the proper outfit of your character.