On such a drawy flop am I best trying to ship it in on the flop? If I rerase what should the size be?

This is not a bad beat story or anything, I'm just wondering what the raise size be considering we have 2 villains and the respective stack sizes. I'm raising this flop like 90-100% vs 2 villains.

$0.1/$0.25 No Limit Holdem
6 players
Converted at weaktight.com

Profiles and Stacks:
UTG ($18.45) 25.5/21.3/1.7 (94)
UTG+1 ($40.15) 30.3/14.5/1.8 (76)
CO ($27.70) 20.0/20.0/4.5 (35)
BTN ($18.90) 22.9/10.0/3.5 (70)
SB ($25.10) 34.9/18.6/4.0 (43)
Hero ($34.90) 15.7/10.8/5.0 (268)

Pre-flop: ($0.35, 6 players) Hero is BB
UTG raises to $0.75, 3 folds, SB calls $0.65, Hero calls $0.5

Flop: ($2.25, 3 players)
SB checks, Hero checks, UTG bets $1.25, SB raises to $4, $4 to Hero ($34.15)?