New EraMLB Neo 39THIRTY Stretch Fit Cap

How do I know what size to get. I need a 7 3/8

I don't understand the sizing on these hats. I used a measuring tape across the crown of my head to be 22-23 inches circumference. What would that be

Is the A on the back of the Angels cap crooked like on the picture?

The title says "stretch fit", but the description says "flex fit". Those are not the same. Which is it?