Roblox ui elements combined with imported images

Hi. I am having trouble with ui buttons.

My border (the white bit) is an image label and the red bit is the imagebutton. How do I crop out the bits circled in blue so that the button can only be clicked in the area inside the white border?

Thanks.

m what if you made the button smaller?

(also the edge seems so small in this case… would it really be that much of a difference?)

Here are some other solutiosns