What size bet are we making here against a raise +2 Calls?

UTG is VP 33, PF 17, 3b 6, Agg 2.0
MP is VP 50, PF 25, 3b 0, Agg 0.0
SB is VP 21, PF 18, 3b 3, Agg 6.5

PokerStars No-Limit Hold'em, $0.05 BB (5 handed) - PokerStars

Converter Tool from FlopTurnRiver.com

UTG ($5.17)
MP ($2.18)
Button ($4.75)
SB ($5.34)
Hero (BB) ($5)

Preflop: Hero is BB with K, K
UTG bets $0.15, MP calls $0.15, 1 fold, SB calls $0.13,

Hero raises to $???