I play $ 1/2NLHE, bankroll not big enough to go to 2/5. When I have been observing players when I am not in a hand, at 1/2 at Foxwoods the standard pre-flop raise for premium hands is around $17. But.. I have recently seen a lot of slow betting/playing Ks with a raise to $10. Generally any raise from about $6 -10 is usually a mid pair , connected cards, suited connectors and even 2-3 Gappers, You will see some LAGs raise on the button because they are on the button, you do hope it goes down to showdown to see the button's hand.