Winning Poker Network (Yatahay) - 200/400 NL - Holdem - 9 players
Hand converted by PokerTracker 4

BTN: 115.67 BB (VPIP: 38.10, PFR: 28.57, 3Bet Preflop: 10.00, Hands: 21)
SB: 15.47 BB (VPIP: 9.52, PFR: 4.76, 3Bet Preflop: 0.00, Hands: 21)
BB: 32.4 BB (VPIP: 14.29, PFR: 0.00, 3Bet Preflop: 0.00, Hands: 21)
UTG: 58.03 BB (VPIP: 19.05, PFR: 9.52, 3Bet Preflop: 12.50, Hands: 21)
UTG+1: 36.08 BB (VPIP: 19.05, PFR: 4.76, 3Bet Preflop: 0.00, Hands: 21)
Hero (MP): 25.35 BB
MP+1: 29.56 BB (VPIP: 14.29, PFR: 10.00, 3Bet Preflop: 0.00, Hands: 21)
MP+2: 22.23 BB (VPIP: 14.29, PFR: 0.00, 3Bet Preflop: 0.00, Hands: 21)
CO: 30.64 BB (VPIP: 28.57, PFR: 23.81, 3Bet Preflop: 0.00, Hands: 21)

9 players post ante of 0 BB, SB posts SB 0.5 BB, BB posts BB 1 BB

Pre Flop: (pot: 2.4 BB) Hero has A A

fold, fold, Hero raises to 2 BB, fold, fold, fold, BTN calls 2 BB, fold, BB calls 1 BB

Flop: (7.4 BB, 3 players) 3 K 2
BB checks, Hero bets 3.7 BB, fold, BB calls 3.7 BB

Turn: (14.8 BB, 2 players) 6
BB checks, Hero checks

River: (14.8 BB, 2 players) 6
BB checks, Hero?

I def bet here, but my question is what size should we use? We have 19.5 bb left, should we jam or just bet 50-70% pot?

I think I just shove, it makes it look bluffy and your hand strength is disguised after checking the turn.

I'm going small with two of the most obvious draws completing. I can see capable villains folding Kx to jams pretty comfortably

Villain is not checking the river with a strong hand.

I also thought that. I shoved and he called with Q 9, but I still think I prefer shoving here, we have the A which is good and we get max value from Kx.

In that case I would suggest looking at your stats/image to see if he might have had a read on you and expected you to bet when he checked. Or it could be that he's just a weak/passive player who was scared of the nut flush.

This - checking the turn when the flush hits and jamming the river looks too strong I'm folding KX absent a read

Bet turn as played half pot it/fold

turn we are setting up river jam, with Ah lets unload clip now