Live 1-3

2 Limps
Hero has AsQd on Button and makes it $21, covering table
BB Unknown asian calls w $525
2 limpers fold

Flop 4s9sTd
Pot = $42
Check
Hero bets $27
Call

Turn Kh
Check
Hero bets $70
Call

River 8s
Check
Pot = $240
Villain has around $400 behind

River Sizing?

No info on villain. Just thinking he is standard Recreational 1-3 Live player, prob passive overall and defending way too many hands vs the 7x open, including things like KQo, KJo, QJo, ATo, KTo, QTo, JTo etc.