EP preflop raiser is running 18/16 over 220, the callers are basically fish who can't fold preflop from what I've noticed, but I don't know if they're fishy enough to hang around with trash when facing a 3-bet from the button

Whats the standard raise size here?

I'm thinking that a standard 3 bet size would be 3-4 times the original raise, but since we have multiple callers we should make it 5-6 times, but then again we don't want to lose everyone...

$2.00 ok?

PokerStars No-Limit Hold'em, $0.10 BB (8 handed) - Poker-Stars Converter Tool from FlopTurnRiver.com

Hero (Button) ($10.40)
SB ($13.85)
BB ($10.15)
UTG ($17.05)
UTG+1 ($7.85)
MP1 ($34.55)
MP2 ($6.40)
CO ($1.85)

Preflop: Hero is Button with ,
UTG bets $0.40, UTG+1 calls $0.40, 1 fold, MP2 calls $0.40, 1 fold, Hero raises to ???