villain is 37-11 over small sample of about 30 hands. No reads beyond stats. Sizing on all streets?

PokerStars No-Limit Hold'em, $0.25 BB (9 handed) - PokerStars Converter Tool from FlopTurnRiver.com

MP2 ($20)
MP3 ($9.69)
CO ($24.80)
Button ($20.30)
SB ($24.40)
BB ($19.16)
Hero (UTG) ($44.43)
UTG+1 ($25)
MP1 ($10)

Preflop: Hero is UTG with A, Q
Hero bets $0.85, 4 folds, CO calls $0.85, 3 folds

Flop: ($2.05) 8, 7, A (2 players)
Hero bets $1.50, CO calls $1.50

Turn: ($5.05) 2 (2 players)
Hero bets $4, CO calls $4

River: ($13.05) 3 (2 players)
Hero bets $??,