Sphere bag policy

I’m going to the concert and seeing the sphere for the first time in a couple weeks and curious how strict they are with the size of your bag.

On Google, I see the bag size policy is 6in x 2in x 6in

And the one I want to get on Amazon is 8in x 2.5in x 6in

So I’m curious are they super strict that they will measure and make you throw it away if it looks slightly bigger ?

Also the bag I’m thinking about getting is all white so my black bag doesn’t stand out too much from my white shirt and shorts. How much does someone or something that’s not white stick out that isn’t wearing white ?

Thanks in advance!