This hand is about my flop sizing. Let me explain:
I decide to bet something like 1/3 pot to give him the opportunity to semibluffraise me with AQ or AK, which would fold if I would reraise shove him on flop.
If I would bet half pot or more, I think the chance is bigger he would call with AQ or AK and in case he would raise on me with such a hand I don't have that much fold equity anymore when I shove it in. 
Wonder what you think about the hand 
PokerStars - $0.50 NL FAST (6 max) - Holdem - 6 players
Hand converted by PokerTracker 4
Hero (BTN): 438.5 BB
SB: 105.4 BB (VPIP: 19.01, PFR: 11.98, 3Bet Preflop: 4.00, Hands: 249)
BB: 144.4 BB (VPIP: 22.72, PFR: 17.19, 3Bet Preflop: 5.86, Hands: 852)
UTG: 50.5 BB (VPIP: 33.33, PFR: 16.67, 3Bet Preflop: 33.33, Hands: 7)
MP: 83.78 BB (VPIP: 22.22, PFR: 14.81, 3Bet Preflop: 12.50, Hands: 30)
CO: 39.5 BB (VPIP: 22.13, PFR: 15.98, 3Bet Preflop: 8.99, Hands: 255)
SB posts SB 0.5 BB, BB posts BB 1 BB
Pre Flop: (pot: 1.5 BB) Hero has K♠ Q♣
fold, MP raises to 3 BB, fold, Hero raises to 9 BB, fold, fold, MP calls 6 BB
Flop: (19.5 BB, 2 players) 6♥ T♠ J♣
MP checks, Hero bets 6.66 BB, MP raises to 22 BB, Hero raises to 429.5 BB and is all-in, MP calls 52.78 BB and is all-in
Turn: (169.06 BB, 2 players) 4♦
River: (169.06 BB, 2 players) 3♠
Spoiler
MP shows A♦ A♥ (One Pair, Aces)
(Pre 86%, Flop 76%, Turn 86%)
Hero shows K♠ Q♣ (High Card, King)
(Pre 14%, Flop 24%, Turn 14%)
MP wins 165.06 BB
