6max K9s BB complete, raise sizing

Party Poker No Limit Hold'em Tournament - t20.00/t40.00 Blinds - 6 players - View hand 1837602
DeucesCracked Poker Videos Hand History Converter

Hero (BB): t2000.00 50 BBs - VPIP: 20, PFR: 16, 3B: 6, AF: 3,8, Hands: 17001
UTG: t1920.00 48 BBs - VPIP: 53, PFR: 29, 3B: 0, AF: 1,3, Hands: 17
MP: t2000.00 50 BBs - VPIP: 18, PFR: 13, 3B: 0, AF: 1,3, Hands: 127
CO: t2000.00 50 BBs - VPIP: 55, PFR: 0, 3B: 0, AF: 1,0, Hands: 11
BTN: t2160.00 54 BBs - VPIP: 86, PFR: 29, 3B: 0, AF: 6,0, Hands: 7
SB: t1920.00 48 BBs - VPIP: 48, PFR: 7, 3B: 0, AF: 1,3, Hands: 29

Pre Flop: (t60) Hero is BB with K 9
UTG raises to t120, 1 fold, CO calls t120, 1 fold, SB calls t100, Hero calls t80

Flop: (t480) 2 9 K (4 players)
SB checks, Hero checks, UTG bets t320.00, CO calls t320, SB folds, Hero raises to t1050, UTG raises to t1780, CO folds, Hero raises to t1880, UTG calls t20 all in

Turn: (t4400) A (2 players - 1 is all in)

River: (t4400) 4 (2 players - 1 is all in)

Final Pot: t4400

What should be my raise sizing here? Didn't noticed that i'd be left with less than I was betting. So should i just jam or make it round 850?