Racking cane question?

Hello I have a stainless steel 1/2ID racking cane. So my question is what ‘s the best size tubing to use would it be 1/2ID or 7/16 tubing?

7/16" silicone… I’d bet the 1/2" you see some small bubbles of air, which also means you’d be oxidizing your brew… Sneezles61