Line check:
How's flatting pre here vs unknown? Another thing..his bet size on the turn is fucked, I don't really know if he's strong or weak here, so I just called as I saw no point in raising. River I don't think I can check behind given his horrid line even though he's probably on wiffed overcards, but do you guys like betting smaller, maybe 50-60c or some weak amount to suck him in?

PokerStars No-Limit Hold'em, $0.05 BB (8 handed) - Poker-Stars Converter Tool from FlopTurnRiver.com

UTG ($8.26)
UTG+1 ($4.97)
MP1 ($1.46)
MP2 ($0.65)
CO ($9.95)
Hero (Button) ($5)
SB ($8.32)
BB ($6)

Preflop: Hero is Button with J, J
4 folds, CO bets $0.20, Hero calls $0.20, 2 folds

Flop: ($0.47) 5, 5, 4 (2 players)
CO bets $0.25, Hero calls $0.25

Turn: ($0.97) 7 (2 players)
CO bets $0.35, Hero calls $0.35

River: ($1.67) 7 (2 players)
CO checks, Hero bets $0.85,