Hi

Game is 1/2, I am in MP and we are 6 handed. I have 200 and am covered by UTG and Button.

UTG limps, so does UTG+1, I have KJo and raise to 12, button calls, UTG calls, UTG+1 folds

FLOP (Pot 39)
K66 rainbow

UTG checks, I check, button checks
TURN
K665

UTG checks, I bet 15, button folds, UTG calls

RIVER (POT69)

K6658 (i cant remember the suits but there is no flush on board)

UTG checks, I bet 25, UTG rasies to 75. I fold

Thinking about the hand I think my bet sizing is too small. I am getting over 3:1 on a call here but I dont think he raises with a K(KT,K9, maybe KQ and KJ are K combos i think he could have given his limp call) If he has 78 I think he calls since his hand has showdown value. The only hand that makes sense is a 6 or 55 .

What are your thoughts?

You shouldn't post the result of the hand (you folding) so the replies aren't affected by it. you also need to be posting any reads you have of the other players such as their gender, age, and playing style, otherwise, we can't really help you much without any information.

As for the hand, you should definitely cbet the flop for value as you probably have the best hand and you don't want to give away free cards. Can't really comment much about your fold without any reads on your opponents, sorry.

Noted. In this case I had just sat down so there were no reads. But he was a middle aged man

Why are you cbetting this? I'm checking through 90% of the time here like our Hero did. What hands are you nervous of catching you on the turn? Ax? Pocket pairs? You're betting to fold hands that are way behind and keep hands in that are beating you (any 6, KQ, KJ etc). This is a classic way ahead/way behind situation and no reason to bet. Let them catch a T on the turn with A10 and get some value. If an ace hits the turn, play it straight up. Saying you cbet for value when there is no value to get makes no sense.

As played, seeing how the board ran out I'm honestly probably checking back river and getting to show down, I don't see what calls me besides some mid PP, but if I'm check-raised by 99 I'm in a tough spot. If the board had run out K66T5 then I'll bet for some value on the ten because people will come along with JT, AT etc, but with K6658 it ended up backdooring a lot of mid PPs, straights, etc, plus the possibility of a 6 or a check-raise bluff.