Button is 50/42 over 24 hands, has 3bet 17% and not gone all in yet.
BB is 58/25 over 12 hands

With 17% 3bet for button and it being barely bigger than a min raise I decided to 4bet to try to isolate against a weaker ace or take the pot right there. In hindsight I think I should have raised quite a bit more but I'm still working my head around the math for bet sizing!

After his all in, as I had no way of forcing a fold after the flop I chose to fold.

Thoughts?

PokerStars No-Limit Hold'em, $0.10 BB (6 handed) - PokerStars Converter Tool from FlopTurnRiver.com

SB ($9.75)
BB ($10)
UTG ($13.10)
Hero (MP) ($27.53)
CO ($4.78)
Button ($9.90)

Preflop: Hero is MP with A, K
1 fold, Hero bets $0.30, 1 fold, Button raises to $0.70, 1 fold, BB calls $0.60, Hero raises to $2.50, Button raises to $9.90 (All-In), 2 folds

Total pot: $5.75 | Rake: $0