if you lay them down on the table and look from up top, they would be roughly similar. In terms of height (if you orient both of them directly towards your face

if you lay them down on the table and look from up top, they would be roughly similar. In terms of height (if you orient both of them directly towards your face, like you are about to plug them into your eyeballs, and measure the y-axis), I believe that lightning cable is about half the size of usb-c. Lightning also feels much lighter (no pun intended).