Smitty Premium 4-Way Stretch Basketball Referee Pants

Why do you have every between size from 38 and down but not 38 and up? I need a 39 for a comfortable fit because 38 is too tight and 40 is too big.

I'm not aware of any manufactures that make a 39" waist.  They are designed to be altered so you can have the 40 taken in, in the waist.  The Flex Belt also does a good job if you are in between sizes.

1 do you measure inseam from groin to where u want pants to stop 2 are they returnable if inseam is done by you

1. Yes you measure from the inside of your pant leg to the bottom for the "inseam". If you were to measure from the outside of the pant leg that is considered the "outseam" 2. If the pants are hemmed they are not returnable.

do these pants give a little in the waist area? where a 34 would give to let it feel like a 35?

They have a little bit of flex, but not a full inch.  They are not an expander pant, so if you need a 35, you would be best off to to ahead and order the 35.

I need the pants in a size 50 waist atheletic style

48 waist is the largest Smitty Apparel makes in these pants. The 48's can be let out in the waist up to a size 50 though. 

How long is the inseam of the pant? Unhemmed.

Usually the pants measure around 37-38" unhemmed.

what is difference between western pocket and nba style pocket?

The western cut pocket runs horizontal along the waistband. 

The NBA Style Pocket (slash pocket) Runs Vertically along the side of the pant near the side seam.