What size bet do you make here?

[1C5]

Party $25. Loose table as you can tell.

Party Poker No-Limit Hold'em, $ Hero (10 handed) converter (http://www.selachian.com/tools/bisonconverter/hhconverter.cgi)

UTG+1 ($37.35)
UTG+2 ($25.45)
MP1 ($54.05)
MP2 ($29.79)
MP3 ($24.25)
CO ($20.41)
Button ($4.4)
SB ($25.4)
Hero ($41.7)
UTG ($25.25)

Preflop: Hero is BB with A/images/graemlins/heart.gif, A/images/graemlins/club.gif. SB posts a blind of $0.1.
<font color="#666666">1 fold</font>, <font color="#CC3333">UTG+1 raises to $1</font>, UTG+2 calls $1, <font color="#666666">1 fold</font>, MP2 calls $1, <font color="#666666">4 folds</font>, <font color="#CC3333">Hero raises to $4.75</font>, UTG+1 calls $4, UTG+2 calls $4, MP2 calls $4.

Flop: ($20.10) 2/images/graemlins/heart.gif, 3/images/graemlins/spade.gif, 7/images/graemlins/diamond.gif <font color="#0000FF">(4 players)</font>
<font color="#CC3333">Hero ?

[edge]

I bet 15 here. That's my standard bet into this pot size after raising preflop.

[Miscreant]

[ QUOTE ]
I bet 15 here.

[/ QUOTE ]

[EMcWilliams]

Looking at the texture of the flop, It's rainbow and all low cards, a good sign for you. Most of the players probably called with those lovely QJ-KJ, A9 and ten hands, maybe a medium to high PP(8-10), so betting around 1/2-2/3 of the pot seems about right.