Four Bet Sizing Preflop

The Four Bet Sizing Job

Your four bet size does two things. It changes your opponent’s price to continue, and it changes the stack to pot ratio on the next street.

You size to either deny equity from dominated or speculative continues, or to induce a shove from the part of the range you dominate.

If you do not know which job your size is doing, you are guessing. Guessing is how you burn EV in online pools.

• Deny equity, force folds from hands with decent raw equity but poor Equity Realization (R).
• Induce shoves, keep worse hands in, and let them punt with low R when stack to pot ratio collapses.

Four bet sizing is not cosmetic. It is your range construction engine.

TPP Exploit Framework

• The Exploit, punish players who 3 bet too wide by choosing sizes that deny them the correct continue price.
• The Risk, over sizing makes your range too face up, and you get over folded to.
• The Counter, if they start 5 bet shoving more, tighten your four bet bluffs and add more value density.

Range Shape Drives Size

Your four bet sizing must match whether your range is Linear vs. Polarized ranges.

Linear means you four bet a lot of good hands. You want folds from the bottom of their 3 bet range, and flats from dominated hands.

Polarized means you four bet nutted value and bluffs. You want your bluffs to have Blockers/Unblockers, and you are fine if the middle continues by calling.

• Linear four bets, common versus tight 3 bet ranges and high rake environments.
• Polarized four bets, common versus wide 3 bet ranges and versus opponents who over fold to four bets.

Your opponent’s range is often Capped vs. Uncapped after they 3 bet and then choose a line. Your sizing should attack that.

If they are capped to non premium continues, you size bigger and force low R hands into mistakes. If they are uncapped and aggressive, you size to control their shove incentives.

TPP Exploit Framework

• The Exploit, versus a linear 3 bettor, use a more linear four bet range and size to deny the suited broadways and suited connectors.
• The Risk, going polarized against a tight 3 bet range creates too many punts with your bluffs.
• The Counter, if they start flatting more 3 bets and 4 bets to protect, shift to smaller sizes and increase postflop pressure.

Default Sizing Templates (100bb Online)

In online pools you are multi-tabling, and your sizing must be simple, repeatable, and hard to exploit.

Use a base template, then deviate with a clear reason. Tracking software will show your population’s response frequencies fast.

• IP versus 3 bet, four bet to about 2.1x to 2.4x the 3 bet size.
• OOP versus 3 bet, four bet to about 2.4x to 2.8x the 3 bet size.
• When stacks are deeper than 150bb, reduce the multiplier slightly IP, and increase value density.

The math goal is to set an SPR that matches your plan. With value you want low SPR. With bluffs you want their continue range to fold enough.

If you are sizing without thinking about SPR, you are playing hope poker. You are handing them free realization.

TPP Exploit Framework

• The Exploit, versus opponents who auto call four bets, increase size OOP to crush their Equity Realization (R).
• The Risk, bigger sizes force you to fold more of your four bet bluffs versus 5 bet shoves.
• The Counter, if they start 5 betting correctly, tighten bluffs and add more flats preflop with playable suited hands.

Sizing to Deny Equity

You deny equity when villain’s continue range contains hands with respectable raw equity but poor Equity Realization (R).

These hands want to call, see flops, and use position or implied odds. Your size removes that comfort.

• Hands you target, 87s, 76s, KJo, QJo, small suited aces in some pools.
• Hands that hate big four bets OOP, 44, 55, and suited connectors that want deep stacks.

When you size up, you reduce their immediate pot odds and force them into an MDF problem.

If they are continuing too much, they are violating Minimum Defense Frequency (MDF) in the opposite direction. They over defend and donate EV with low realization hands.

• IP deny size, keep it clean and firm, so their call is expensive and their shove is not automatically profitable.
• OOP deny size, go larger, because you suffer realization loss out of position and you need them to pay for it.

Do not set mine four bets without direct odds. If you call with 44 hoping to flop a set, you are donating to rake-drag and to tight c bet ranges.

TPP Exploit Framework

• The Exploit, versus callers, size up and then c bet small on high card boards to win with range advantage.
• The Risk, too large makes your bluffs unplayable and pushes villain into correct shove ranges.
• The Counter, if they begin folding too much, downsize and add more four bet bluffs with strong blockers.

Sizing to Induce Shoves

You induce when your opponent over shoves, or when you want them to convert a dominated equity share into a stack-off mistake.

This is common in online pools where players simplify to 5 bet jam or fold. Your job is to set a trap with price.

• Induce sizing is smaller, so their jam looks attractive.
• You keep their dominated continues in, and you protect your range from being too value heavy.

Your bluffs must be chosen by Blockers/Unblockers.

• Good blocker bluffs, A5s, A4s, KQo in some configurations.
• Avoid unblockers that let them have premiums, like low suited connectors when you need folds.

Induce sizing works best when villain is somewhat Capped vs. Uncapped. If they are uncapped and balanced, they jam correctly and you do not gain much.

In that case, your sizing should revert closer to equilibrium templates.

TPP Exploit Framework

• The Exploit, versus jam-happy regs, downsize four bets and widen value jams calls, punish their over aggression.
• The Risk, small four bets give them great price to call in position and realize too much.
• The Counter, if they stop jamming and start calling, increase size and shift to a more linear four bet range.

IP Baseline, BTN or CO Versus BB 3 Bet

This is the cleanest environment to learn the mental model. You are IP with control over later street sizing.

Your four bet size can be slightly smaller, because IP you realize equity better and you can apply pressure postflop.

• Four bet for value in a linear plan, QQ+, AK, then add JJ and AQs as the BB gets wider.
• Four bet bluffs in a polarized plan, A5s-A4s, some KQo mixes, depending on fold to four bet stats.

If BB 3 bets wide and folds too much to four bets, you choose a size that maximizes fold equity.

If BB 3 bets wide and calls too much, you choose a deny size and push their realization down.

TPP Exploit Framework

• The Exploit, use tracking software stats like fold to 4 bet and 5 bet jam frequency, then pick deny size or induce size.
• The Risk, over fitting to small samples creates sizing tells across multi-tabling.
• The Counter, when the pool adapts, return to a stable template and adjust mainly via range composition.

OOP Tough Spots, SB Versus BTN 3 Bet

OOP you lose realization. Your default should be larger, and your range should be tighter and more value dense.

If you choose a small four bet OOP, you are inviting IP calls that print for them with position.

• Value core, QQ+, AK, then add JJ selectively.
• Bluffs must have premium blockers, A5s-A2s, and occasional KQo if they over fold.
• Hands to avoid as four bet bluffs OOP, 87s, KJo, small pairs like 44 without a clear jam plan.

Your target is to remove their ability to call and play poker IP. You either win preflop, or you create an SPR that lets you c bet and barrel with leverage.

If they respond by 5 bet jamming more, your four bet bluffs must tighten around blockers and your value calls widen.

TPP Exploit Framework

• The Exploit, versus BTN who calls too many four bets, size up OOP and barrel more boards that hit your uncapped range.
• The Risk, if you size too big, you force yourself into folding hands that could have profitably four bet small.
• The Counter, if BTN starts 5 bet shoving correctly, reduce bluff frequency and shift to flatting more 3 bets with hands that realize well.

Multi-Way Pressure and Sizing Discipline

Multi-way pots change everything. Four betting is rarer, and when you do it, the goal is usually to isolate and collapse SPR.

If there is a cold caller between, you should assume stronger ranges and worse fold equity.

• Go more linear and value heavy, QQ+, AK, and tighten bluffs sharply.
• Increase sizing to punish loose calls and reduce implied odds for hands like 44 and 87s.

Online rake-drag punishes small edges in bloated multi-way pots. Do not create them with thin four bet bluffs.

TPP Exploit Framework

• The Exploit, versus tables that over call multi-way, use bigger four bets and stop giving them implied odds.
• The Risk, you can torch EV if you 4 bet and then fold too much versus a jam in a spot where ranges are strong.
• The Counter, if the table tightens and starts back raising, reduce four bet frequency and lean on flats and postflop skill.

Scenario Box

BTN vs BB 3 Bet, Induce Size Line

Hero Hand: A♠5♠

Flop: K♣ 7♥ 2♠

Action: BTN opens. BB 3 bets. BTN 4 bets smaller to induce. BB calls. Flop goes check to BTN.

Your four bet is a Polarized bluff driven by Blockers/Unblockers. You block strong ace combos, and you do not block their folds like suited junk.

On this flop, your range is less capped than theirs. You have more strong kings and overpairs. They have a lot of missed broadways with poor Equity Realization (R).

• C bet small with range, then punish over folds.
• If they check raise too much, tighten continuation with air and keep pressure with hands that can barrel.

Four Bet Sizing Checklist (Online Execution)

This is the decision tree you use while multi-tabling.

• Identify range shape, Linear vs. Polarized ranges.
• Identify who has the Capped vs. Uncapped advantage after the 3 bet.
• Pick the job, deny equity or induce shove.
• Confirm bluff selection with Blockers/Unblockers.
• Estimate response frequency using pool reads or tracking software, then sanity check with Minimum Defense Frequency (MDF).
• Reject hope-based continues, no set mining 44 without correct price.

TPP Exploit Framework

• The Exploit, standardize a base size, then deviate only when a clear pool leak shows up in your database.
• The Risk, random deviations create a sizing fingerprint and strong players exploit it.
• The Counter, if opponents start counter sizing or 5 betting more, stabilize sizes and adjust using range composition first.