Before replying 'standard' is my raise sizing a little bit too big? Even with top pair I think i may be putting a bit too much pressure on my opponent

PokerStars No-Limit Hold'em, $0.50 BB (7 handed) - Poker-Stars Converter Tool from FlopTurnRiver.com

saw flop

SB ($81.15)
BB ($49.75)
Hero (UTG) ($50)
MP1 ($10)
MP2 ($54.20)
CO ($50.50)
Button ($56.65)

Preflop: Hero is UTG with Q, Q
Hero bets $2, 3 folds, Button calls $2, 2 folds

Flop: ($4.75) 2, 9, J (2 players)
Hero bets $3.50, Button calls $3.50

Turn: ($11.75) 4 (2 players)
Hero bets $9, Button calls $9

River: ($29.75) 5 (2 players)
Hero bets $20, Button raises to $42.15 (All-In), Hero calls $15.50 (All-In)

Total pot: $100.75 | Rake: $3