NL 2 3bet spot + 2 calls

CO is a rec and UTG is a weak reg. Is this an ok bet turn and what abou the size?

Yatahay Network - $0.02 NL (6 max) - Holdem - 6 players
Hand converted by PokerTracker 4

BTN: 147 BB (VPIP: 15.45, PFR: 12.73, 3Bet Preflop: 0.00, Hands: 115)
SB: 80.5 BB (VPIP: 16.96, PFR: 11.61, 3Bet Preflop: 0.00, Hands: 115)
BB: 111.5 BB (VPIP: 20.79, PFR: 14.85, 3Bet Preflop: 0.00, Hands: 105)
UTG: 184.5 BB (VPIP: 30.30, PFR: 24.24, 3Bet Preflop: 14.29, Hands: 35)
Hero (MP): 114 BB
CO: 85 BB (VPIP: 27.36, PFR: 16.98, 3Bet Preflop: 2.78, Hands: 110)

SB posts SB 0.5 BB, BB posts BB 1 BB

Pre Flop: (pot: 1.5 BB) Hero has A♣ Q♣

UTG raises to 2 BB, Hero raises to 6 BB, CO calls 6 BB, fold, fold, fold, UTG calls 4 BB

Flop: (19.5 BB, 3 players) 3♠ J♦ 8♦
UTG checks, Hero checks, CO checks

Turn: (19.5 BB, 3 players) K♥
UTG checks, Hero bets 9.5 BB, fold, fold

Hero wins 19 BB