Labs neck size

Question
I've been searching the internet for a 'standard' neck size for a grown Lab and can't find anything.  Is their neck size between 14 -20 inches?  Trying to figure out collar size for when I adopt my rescue. Thank you.

Answer
There is no 'standard'.  My girls are fine with a color that's about 20" and adjustable.  My older male is about 22".  

If you are getting a girl, go for a 20" adjustable.  If you are getting a boy, try a 22" adjustable.  By something cheap initially, then bring the dog into the store and buy a PERFECT color where you can try it on in the store.